tennis
Frances Tiafoe and Jessica Pegula: A Surface Elo Deep Dive
Two names sit just outside the group of players we have already covered in this surface-Elo series: Frances Tiafoe, No. 6 in our ATP overall Elo, and Jessica Pegula, No. 3 in our WTA overall Elo. Both are firmly top 10 by our surface-specific Elo model. What that single overall number hides is how differently the two of them are built: one is unusually consistent across all three surfaces, the other has a clear soft spot on one of them.
This article uses our leaderboard’s training run from October 11, 2026 (03:10 UTC), built from 35,721 processed matches. Ratings are recalculated weekly from our full match database, not a fixed window, so treat every number below as a snapshot of that date rather than a permanent figure. Player-level detail, surface splits, logged match counts, and recent-match records, comes from each player’s own page, last updated the same day.
Frances Tiafoe: top 10 overall, but off the clay top 20 entirely
Tiafoe’s overall Elo rating is 1859, good for No. 6 on our ATP leaderboard, built from 100 tracked matches. Broken out by surface, the picture is uneven:
| Surface | Elo Rating | ATP Surface Rank |
|---|---|---|
| Overall | 1859 | No. 6 |
| Hard | 1795 | No. 9 |
| Grass | 1737 | No. 14 (tied) |
| Clay | 1653 | Not in top 20 |
On hard, his 1795 rating places him 9th among ATP players, a reasonable showing behind the game’s current top tier (Carlos Alcaraz leads at 1984). On grass, his 1737 ties him for 14th with Felix Auger Aliassime, both at the identical rating.
Clay is where the story changes. His 1653 clay rating does not reach our ATP clay top 20 at all. The 20th and final name on that list, Alex De Minaur, sits at 1728, meaning Tiafoe would need to close a 75-point gap just to appear on the list. This is not a case of a thin sample forcing him off a surface ranking: he has 100 total tracked matches, far above the 15-match floor our leaderboard requires before a player is considered at all. He simply rates below the cutoff on this one surface, right now.
It is worth separating this rating from his career record. His own player-page profile lists a career clay mark of 133 wins against 79 losses, a winning record overall. The Elo number here reflects recent form captured in our rolling match database, not a career summary, and the two can disagree.
Tiafoe’s recent record
Tiafoe’s 10 most recently logged matches run from August 23 to October 9, 2026, all on hard courts:
- Wins: Yannick Hanfmann (Oct. 9), Kei Nishikori (Oct. 1), Alex Michelsen (Sept. 8), Daniil Medvedev (Sept. 6), Valentin Vacherot (Sept. 4), Rei Sakamoto (Sept. 2), Martin Damm (Aug. 31)
- Losses: Arthur Fils (Oct. 2), Ben Shelton (Sept. 11), Arthur Fils again (Aug. 23)
That is 7 wins and 3 losses in his last 10 logged matches, all of them on hard courts, and all of his losses came against players who themselves sit inside our ATP top 10 or close to it. The log runs right up to October 9, just three days before this article’s training date, so this is a current read on his hard-court form specifically, not a stale one.
Jessica Pegula: top 20 on every surface, but not the leader on any
Pegula’s overall Elo rating is 1996, No. 3 on our WTA leaderboard, built from 112 tracked matches. Her surface split looks very different from Tiafoe’s:
| Surface | Elo Rating | WTA Surface Rank |
|---|---|---|
| Overall | 1996 | No. 3 |
| Hard | 1943 | No. 3 |
| Grass | 1810 | No. 6 |
| Clay | 1804 | No. 14 |
Every one of her three surface ratings lands inside our WTA top 20, the only player in this series so far for whom that is true on all three surfaces at once. Her best relative placement is hard, where 1943 ranks 3rd, behind Elena Rybakina (2008) and Aryna Sabalenka (2002). Grass puts her 6th at 1810, behind Iga Swiatek (1891), Linda Noskova (1886), Sabalenka (1877), Madison Keys (1843), and Karolina Muchova (1840). Clay is her weakest relative surface, 14th at 1804, seven points ahead of 15th-place Diana Shnaider (1797) and sitting in a list whose bottom four names (17th through 20th) span just three points, from 1784 down to 1781.
Unlike Tiafoe, there is no surface where Pegula falls off the ranked list entirely. Her career profile backs that up in a different way: 323 wins against 149 losses on hard, 139 against 83 on clay, and 40 against 25 on grass, a winning record on every surface by her own page’s career figures.
Pegula’s recent record, and an honest gap in the log
Pegula’s 10 most recently logged matches run from August 19 to September 10, 2026, all on hard courts:
- Wins: Emma Navarro (Sept. 8), Sorana Cirstea (Sept. 6), Leylah Annie Fernandez (Sept. 4), Sofia Kenin (Sept. 2), Elena Gabriela Ruse (Aug. 30), Iga Swiatek (Aug. 22), Amanda Anisimova (Aug. 20), Sorana Cirstea again (Aug. 19)
- Losses: Aryna Sabalenka (Sept. 10), Cori Gauff (Aug. 23)
That is 8 wins and 2 losses, including a win over Swiatek. Worth flagging plainly: her log ends on September 10, about a month before this article’s October 11 training date, while Tiafoe’s log runs nearly to the training date itself. That is a property of which matches our pipeline has most recently captured for each player, not a claim that Pegula stopped playing after mid-September. Treat “recent matches” here as the last 10 entries in our tracked data, not a live schedule.
What the contrast actually shows
Tiafoe and Pegula sit three places apart on their respective tours in our overall Elo, and both are inside the top 10. But “top 10 overall” is doing very different work for each of them. Tiafoe’s overall number is carried by a genuinely strong hard-court rating (9th) and a solid grass number (tied 14th), while his clay rating would not crack the ATP clay top 20 at all, a 75-point gap below the current 20th-place cutoff. Pegula’s overall number, by contrast, is built from three ratings that each independently clear their own surface’s top 20, none of them a standout leader, all of them solidly present.
Neither pattern is better or worse in any predictive sense; they are simply different shapes of the same overall rank. A single overall number would not tell you which of these two shapes you were looking at. That is the entire argument for tracking Elo by surface in the first place, and it is worth comparing against what we found in our Zverev and Kostyuk deep dive (coming soon), where both players saw every surface rating sit below their overall figure, a pattern neither Tiafoe nor Pegula fully matches.
How these Elo ranks compare to official tour rank
Each player’s page also carries an official tour ranking alongside our model’s own Elo-based rank, and the two do not always line up. Pegula’s official ranking is No. 3, identical to her No. 3 spot in our overall Elo table. Tiafoe’s official ranking is No. 8, two places below his No. 6 spot in our overall Elo table. Neither gap is large, and a two-place difference between an official ranking system (built from tournament points over a rolling period) and an Elo-based model (built from match-by-match results in our own tracked database) is unremarkable; the two systems weight different things and are not meant to produce identical output. It is simply another way of seeing that Tiafoe’s overall standing in our model leans more on his hard and grass numbers carrying him past where his clay rating alone would place him, while Pegula’s official and Elo ranks agree because nothing in her surface split is pulling in a different direction.
Turning any of this into a probability
None of the rankings above say anything about a specific opponent. Elo only produces a usable probability once you compare two named players’ ratings on the same surface. Tiafoe’s 1795 hard-court rating and Pegula’s 1943 hard-court rating are not directly comparable to each other since they play on different tours; what each number is useful for is comparing against a specific opponent on the same tour and surface. Our Elo probability calculator converts an actual rating gap between two named players into a percentage, instead of asking you to read a prediction off a rank or a raw rating difference.
What this data doesn’t show
These ratings describe where our model places each player right now, on each surface, based on the matches in our tracked database. They say nothing about injury status, scheduling, motivation, or form heading into any specific event. They also cannot explain why Tiafoe’s clay number lags his hard and grass ratings so much, or why Pegula’s numbers sit so evenly across all three surfaces; this dataset tracks results, not the reasons behind them.
Sample sizes matter too. Both players carry 100-plus total tracked matches, comfortably clear of our 15-match minimum, so neither rating here is a thin-sample outlier in the way some surface splits can be elsewhere in this series. And as with every number on this site, these are snapshots from a weekly-retrained model, not season-long averages or a prediction for either player’s next match.
Where to check the live numbers
The figures above are a snapshot from our October 11, 2026 training run. Ratings update weekly as our match database grows, so check the full Elo leaderboard or Tiafoe’s and Pegula’s own player pages for current numbers. Neither this article nor any page it links to is a prediction for a specific upcoming match; it is a form reference, current as of the training date stated above.
Frequently asked questions
- Is Frances Tiafoe a weak clay-court player?
- By our model's current numbers, clay is clearly his softest surface relative to his own hard and grass ratings: his clay Elo (1653) sits 75 points below the rating needed to reach our ATP clay top 20 (Alex De Minaur's 1728, in 20th). That is a statement about this rolling rating, not his career record, which is a winning 133-79 on clay by his own player-page profile data.
- Why is Jessica Pegula not higher than No. 3 on the WTA Elo leaderboard if she ranks inside the top 20 on every surface?
- Being inside the top 20 on hard, clay, and grass does not mean leading any of them. Her best surface placement is 3rd on hard (1943), behind Elena Rybakina and Aryna Sabalenka; she is 6th on grass (1810) and 14th on clay (1804). Consistency across surfaces and leading a surface outright are different things, and her overall rating (1996, also 3rd) reflects the former more than the latter.
- Why does Jessica Pegula's recent-match log stop in mid-September while Tiafoe's runs into October?
- Both logs show each player's 10 most recently recorded matches, not a live schedule. Tiafoe's happens to run through October 9, 2026; Pegula's happens to end on September 10, 2026. That gap reflects which matches our data pipeline has most recently captured for her, not a claim that she stopped playing after that date.
- How many matches does a player need before a surface rating is considered reliable here?
- The leaderboard requires at least 15 total tracked matches before a player appears at all, but each surface top 20 only ever shows 20 names. A player missing from a surface's top 20, like Tiafoe on clay, is not necessarily short on matches: he has 100 total tracked matches, well over the floor. He is simply rated below the 20th-place cutoff on that one surface.
- Does a top-3 overall Elo ranking mean a player is favored in their next match?
- No. An overall or surface rank says nothing about a specific opponent. Elo only produces a probability once you compare two named players' ratings on the same surface. Our probability calculator converts an actual rating gap into a percentage instead of asking you to read it off a rank.