| Tournament | Round | Chris May | Olga Visser |
| 30.01.2000 City of Sydney International Masters (NSW) | 13 | 524 | 232 |
| 21.07.2002 Winter Masters (NSW) | 12 | 340 | 450 |
| 12.04.2004 Australian Championships (ACT) | 12 | 490 | 361 |
| 28.11.2004 Southport (QLD) | 6 | 460 | 395 |
| 30.01.2005 City of Sydney International Masters (NSW) | 12 | 459 | 305 |
| 03.10.2005 New South Wales Championships (NSW) | 2 | 480 | 358 |
| 04.02.2007 Kempsey Challenge (NSW) | 9 | 558 | 334 |
| 04.10.2008 NSW CHAMPIONSHIPS 08 (NSW) | 10 | 427 | 428 |
| 25.01.2009 City of Sydney International Masters (NSW) | 14 | 506 | 302 |
| 25.04.2011 Aus Championship (ACT) | 2 | 526 | 366 |
| Head-to-head after 10 games | 8 | 2 | |
| Average score | 477 | 353.1 | |
| Spread: | 1239 | -1239 | |