── the model's take · from Elo · neutral court
Win probability
The model makes Learner Tien a slight 53% favourite on a neutral court; the surface splits below move it.
Karen Khachanov
Learner Tien
47%53%
Hard: 45% / 55%
Clay: 63% / 37%
Grass: 80% / 20%
An analytical read from the model's Elo — not a betting signal.
── who holds the edge · vs the rated field
Serve & return matchup
Serve
Karen Khachanov
90th · elite
Learner Tien
63th · average
Return
Karen Khachanov
81th · strong
Learner Tien
95th · elite
Model serve/return ratings as a percentile of the rated tour — the edge behind the win probability.
── head to head
Compare
#26
model rank
#19
Clay
best surface
Hard
Right
hand
Left
RUS
country
USA
198cm
height
180cm
── model Elo over time
Trajectories
■ Karen Khachanov■ Learner Tien
── meetings by surface
Surface record
Hard1–0
── 1 meetings
Every meeting
| date | tournament | surf | rd | winner | score |
|---|---|---|---|---|---|
| 2026-09-07 | US Open | Hard | R16 | Karen Khachanov | 7-5 4-6 6-7(6) 6-1 6-4 |