S. Costoulas vs J. Ruggeri — prediction

The model makes S. Costoulas the favorite with a 59% win probability, against J. Ruggeri's 41% — a tight match, without a wide margin. Converted to odds, that probability is worth about @1.71; the offered odds are around @1.08 (a 93% implied), slightly below the market, so the model is a touch more cautious.

Several factors explain the number: #155 vs #216 (better ranked); 3/10 in recent matches; model 59% vs market 93% → the model sees it as less likely than the odds.

Read it with perspective. Our probability is calibrated — when the model says 59%, 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 41 out of every 100 times Ruggeri 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. Watch out for: Coming off 4 losses in a row; Returning from a long layoff (35d) — possible rustiness. This is informational analysis, not a betting recommendation. 18+ · play responsibly.