Sanctioned Matchup Predictor
David Haley vs Calvin Zhao
Past Head-to-Head Rubbers (3)
| Winner | Loser | Score | Event | Rating Delta | |
|---|---|---|---|---|---|
| David Haley | def. | Calvin Zhao | 3,1,-8,12 | 2025 GDTTA Autumn Sunday League R 2 (2025-04-20) | +2 |
| David Haley | def. | Calvin Zhao | 8,2,7 | 2025 GDTTA Winter Sunday League Rnd 4 (2025-07-27) | +3 |
| David Haley | def. | Calvin Zhao | 4-0 | GDTTA Spring Sunday League R9 (2024-12-01) | +5 |