| 努美阿挑战赛 | 01/03 09:40 | 26 | [400] 科林•辛克莱 v 伯诺依特•帕尔雷 [117] | 6-4,2-6,2-6 | |
| 努美阿挑战赛 | 01/02 02:40 | 25 | [452] 鲁宾•斯塔姆 v 科林•辛克莱 [400] | 7-6,4-6,4-6 | |
| 四日市市挑战赛 | 11/26 04:35 | 14 | [366] 科林•辛克莱 v 何承叡 [173] | 3-6,5-7 | |
| 横滨挑战赛 | 11/21 03:45 | 25 | [366] 科林•辛克莱 v 马蒂斯•埃哈德 [342] | 3-6,2-6 | |
| 横滨挑战赛 | 11/20 03:30 | 19 | [306] 乔瓦尼•福尼奥 v 科林•辛克莱 [361] | 3-6,7-5,6-7 | |
| 横滨挑战赛 | 11/19 07:55 | 14 | [484] 纳坦•彭惠特 v 科林•辛克莱 [361] | 3-6,6-7 | |
| 神户挑战赛 | 11/12 01:00 | 14 | [387] 詹姆斯•特罗特 v 科林•辛克莱 [361] | 6-4,7-5 | |
| 挑战赛 - 悉尼 | 10/30 04:05 | 25 | [353] 科林•辛克莱 v 马利克•波尔曼斯 [160] | 4-6,2-6 | |
| 深圳挑战赛 | 10/19 07:55 | 26 | [362] 科林•辛克莱 v 洛伦佐∙吉斯蒂诺 [290] | 3-6,4-6 | |
| 深圳挑战赛 | 10/16 07:00 | 26 | [228] 叶夫根尼•多斯科伊 v 科林•辛克莱 [362] | 6-2,3-6,4-6 | |
| 深圳挑战赛 | 10/11 03:40 | 25 | [69] Thanasi 科基纳基斯 v 科林•辛克莱 [347] | 6-2,3-6,6-3 | |
| 深圳挑战赛 | 10/10 04:00 | 19 | [347] 科林•辛克莱 v 黄琮豪 [400] | 3-6,6-4,6-2 |
Colin Sinclair (born December 19, 1994) is a Northern Mariana Islander tennis player.
He achieved a career best singles ranking of world No. 340 on 18 September 2023, and a career high doubles ranking of world No. 200 on 10 April 2023. He has won 2 singles titles on the ITF Futures Tour. Additionally, he has won 2 titles on ATP Challenger Tour and 7 titles on the ITF Futures Tour in doubles.
He represents his country in Davis Cup as part of the Pacific Oceania team since 2017 and has a career record of 18–5 (13–3 in singles, 5–2 in doubles) in the competition. He has been coached by Jeff Race, Ian Malpass, and Silviu Tanasoiu.