Sanctioned Matchup Predictor
Mark John Turner vs Derek Chen
Past Head-to-Head Rubbers (7)
| Winner | Loser | Score | Event | Rating Delta | |
|---|---|---|---|---|---|
| Derek Chen | def. | Mark John Turner | 7,-9,4,1,10 | 2026 GDTTA Sunday League Spring Rnd 3 (2026-10-11) | +14 |
| Mark John Turner | def. | Derek Chen | 4-2 | 2025 GDTTA Autumn Masters League R2 (2025-04-23) | +12 |
| Mark John Turner | def. | Derek Chen | 4-2 | 2025 GDTTA Autumn Masters League R7 (2025-05-29) | +10 |
| Derek Chen | def. | Mark John Turner | 9,5,10,6 | 2025 GDTTA Winter Masters League Rnd 5 (2025-08-07) | +5 |
| Derek Chen | def. | Mark John Turner | 4,3,-12,-8,10,8 | 2025 GDTTA Winter Masters League Rnd 10 (2025-09-11) | +5 |
| Derek Chen | def. | Mark John Turner | -8,2,3,-9,6,7 | 2026 GDTTA Sunday League Winter Rnd 1 (2026-07-12) | +17 |
| Derek Chen | def. | Mark John Turner | 8,10,9,9 | 2026 GDTTA Sunday League Winter Rnd 6 (2026-08-16) | +14 |