S. Sierra vs S. Stephens — prediction
Consistent bounce, medium-fast: neutral conditions, no style favored.
Warm: the ball flies a little more and fitness counts.
Dry air: the ball travels normally.
Light wind: no noticeable effect.
Surface feeds the model (surface specialization is one of its factors). Weather and altitude are context we publish for you — they do NOT move the probability.
›Ranking: #86 vs #320 (better ranked)
›Recent form: 4/10 in recent matches
›Model 64% vs market 54% → the model sees it as MORE likely than the odds
The model makes S. Sierra the favorite with a 64% win probability, against S. Stephens's 36% — a solid favorite, though Stephens keeps real chances. Converted to odds, that probability is worth about @1.56; the offered odds are around @1.86 (a 54% implied), slightly above the market, so the model is a touch more optimistic.
Several factors explain the number: #86 vs #320 (better ranked); 4/10 in recent matches; model 64% vs market 54% → the model sees it as more likely than the odds.
Read it with perspective. Our probability is calibrated — when the model says 64%, that outcome happens roughly that percentage of the time, with ~64% out-of-sample accuracy — but being the favorite is not being the winner: roughly 36 out of every 100 times Stephens wins. The model also tends to agree with the market, so the odds already capture almost all the edge: don't take it as a sure value. This is informational analysis, not a betting recommendation. 18+ · play responsibly.