| 戴維斯盃 | 07/20 05:30 | - | 科林•辛克萊 v 默罕穆德•阿利亞瑪尼 | 6-1,5-0 | |
| 戴維斯盃 | 07/19 10:05 | 2 | Sharmal 迪薩納亞克 v 科林•辛克萊 | 4-6,4-6 | |
| 戴維斯盃 | 07/17 07:20 | 1 | 卡里姆•阿爾阿拉夫 v 科林•辛克萊 | 4-6,0-6 | |
| ITF比利時F4資格賽 | 07/08 16:20 | 62 | 馬克桑斯•布羅維爾 v 科林•辛克萊 | 6-4,6-2 | |
| ITF比利時F3 | 07/06 11:00 | 26 | 科林•辛克萊 v 亞麗克西斯∙穆斯勒卡 | 6-3,2-6,1-6 | |
| ITF比利時F3 | 07/04 14:35 | 25 | 西蒙•納瓦羅 v 科林•辛克萊 | 6-7,7-6,2-6 | |
| ITF比利時F3資格賽 | 07/03 11:00 | 62 | 科林•辛克萊 v 特奧多 Giusca | 6-3,1-6,6-3 | |
| ITF比利時F3資格賽 | 07/02 08:00 | 62 | 康斯坦特•德拉巴瑟蒂埃 v 科林•辛克萊 | 4-6,2-6 | |
| ITF比利時F3資格賽 | 07/01 10:00 | 62 | 馬克 S 梅耶爾 v 科林•辛克萊 | 0-6,1-6 | |
| ITF美國F20 | 06/22 00:55 | 25 | 朱利安 Zlobinsky v 科林•辛克萊 | 1-6,7-6,6-3 | |
| ITF美國F20 | 06/19 17:00 | 62 | 科林•辛克萊 v Alex Kobelt | 4-6,6-4,6-4 | |
| ITF美國F20 | 06/18 16:00 | 62 | 費利佩•拉米雷斯•盧納 v 科林•辛克萊 | 5-7,2-6 | |
| ITF美國F18 | 06/14 17:50 | 25 | 科林•辛克萊 v 塞缪爾∙莫奈 | 6-4,4-6,2-6 | |
| ITF美國F18 | 06/12 16:00 | 62 | 科林•辛克萊 v 馬克 Oljaca | 6-2,6-1 | |
| ITF美國F3 | 01/08 17:30 | 60 | 亞歷山大•科瓦切維奇 v 科林•辛克萊 | 6-4,6-2 | |
| ITF美國F3 | 01/07 18:30 | 60 | 卡洛斯∙拉米瑞茲∙烏特曼 v 科林•辛克萊 | 3-6,6-4,4-6 | |
| ITF美國F20資格賽 | 06/29 17:30 | - | 邁凱爾•托皮加德 v 科林•辛克萊 | 6-2,6-2 | |
| ITF美國F18 | 06/22 16:00 | - | 多米尼克•科特羅內 v 科林•辛克萊 | 7-6,6-1 |
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.