| Challenger Noumea | 01/03 09:40 | 26 | [400] 싱클라이어, 콜린 v 파이레, 베노이트 [117] | 6-4,2-6,2-6 | |
| Challenger Noumea | 01/02 02:40 | 25 | [452] Statham, Rubin v 싱클라이어, 콜린 [400] | 7-6,4-6,4-6 | |
| Challenger Yokkaichi | 11/26 04:35 | 14 | [366] 싱클라이어, 콜린 v 호, 레이 [173] | 3-6,5-7 | |
| Challenger Yokohama | 11/21 03:45 | 25 | [366] 싱클라이어, 콜린 v 엘하드, 마티스 [342] | 3-6,2-6 | |
| Challenger Yokohama | 11/20 03:30 | 19 | [306] 포니오, 기오바니 v 싱클라이어, 콜린 [361] | 3-6,7-5,6-7 | |
| Challenger Yokohama | 11/19 07:55 | 14 | [484] 폰위드, 나단 v 싱클라이어, 콜린 [361] | 3-6,6-7 | |
| Challenger Kobe | 11/12 01:00 | 14 | [387] 트로터, 젬스 켄트 v 싱클라이어, 콜린 [361] | 6-4,7-5 | |
| Challenger Sydney | 10/30 04:05 | 25 | [353] 싱클라이어, 콜린 v 폴만스, 마르크 [160] | 4-6,2-6 | |
| Shenzhen, China | 10/19 07:55 | 26 | [362] 싱클라이어, 콜린 v 기우스티노, 로렌조 [290] | 3-6,4-6 | |
| Shenzhen, China | 10/16 07:00 | 26 | [228] 돈스코이, 에브게니 v 싱클라이어, 콜린 [362] | 6-2,3-6,4-6 | |
| Shenzhen, China | 10/11 03:40 | 25 | [69] 코키나키스, 다나시 v 싱클라이어, 콜린 [347] | 6-2,3-6,6-3 | |
| Shenzhen, China | 10/10 04:00 | 19 | [347] 싱클라이어, 콜린 v 황, 충하우 [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.