Most racedays with other riders
Riders sorted by the number of times they started in the same race as Sum Keyson Chan.
| # | Rider | Number of races |
|---|---|---|
| 1 | ROWDIE Loughlin | 1 |
| 2 | LUK Tsz Fai | 1 |
| 3 | LAI Yan Nok | 1 |
| 4 | LAI Amber | 1 |
| 5 | CHENG Wang Hin | 1 |
| 6 | CHAU King Long | 1 |
| 7 | WU Lok Chun | 1 |
| 8 | LAW Kwun Wan | 1 |
| 9 | WONG Kai Chun | 1 |
| 10 | YAU Chin Ho | 1 |
| 11 | MACKEVICIUS Clinton | 1 |
| 12 | CHIU Ho San | 1 |
| 13 | HON Chun Ting | 1 |
| 14 | CHAN Chi Hang | 1 |
| 15 | SIN Lucas | 1 |
| 16 | CHIU Po Wah | 1 |
| 17 | LAU Ka Kit | 1 |
| 18 | WONG Toi Yeung | 1 |
| 19 | CHAN Tsz Fung | 1 |
| 20 | FAI TANG Chun | 1 |
| 21 | FUNG Pak Hei | 1 |
| 22 | WONG Tsz Chin | 1 |
| 23 | CHOI Chun Yin | 1 |
| 24 | HO YUEN Chi | 1 |
| 25 | CHUNG Yuet Shan | 1 |
| 26 | CHEUNG King Wai | 1 |
| 27 | CHEUNG Chun Woh | 1 |
| 28 | KIT TANG Wing | 1 |
| 29 | TONKS David John | 1 |
| 30 | TANG Wang Yip | 1 |
| 31 | HANG KAN Koon | 1 |
| 32 | CHEUNG Fu Shiu | 1 |
| 33 | CHEUNG King Lok | 1 |
| 34 | MAN CHAU Wai | 1 |
| 35 | KEUNG Taz Hing | 1 |
| 36 | KO Siu Wai | 1 |
| 37 | HO Burr | 1 |
| 38 | YEUNG Ronald | 1 |
| 39 | LEUNG Chun Wing | 1 |
| 40 | MOW Ching Yin | 1 |
| 41 | LAU Wan Hei Victor | 1 |
| 42 | MAIERS Michael | 1 |
| 43 | CHIU Tsun Hin | 1 |
| 44 | TAM Tsun Ming | 1 |
| 45 | CLATWORTHY Fred | 1 |