| Challenger Brisbane Qual | 02/02 01:30 | 14 | Thomas Braithwaite v Colin Sinclair | 1-6,6-3,7-6 | |
| Challenger Brisbane | 01/27 00:00 | 19 | [454] Kokoro Isomura v Colin Sinclair [378] | 6-4,6-4 | |
| Challenger Brisbane | 01/26 03:10 | 14 | Duje Markovina v Colin Sinclair | 7-6,3-6,2-6 | |
| Challenger Noumea | 12/31 06:25 | 25 |
[415] Benoit Paire
v
Colin Sinclair [374] |
6-7,6-1,7-5 | |
| ITF M25 Carrara | 11/27 00:00 | 25 | Moerani Bouzige v Colin Sinclair | 6-4,6-7,6-3 | |
| Davis Cup | 11/23 07:30 | 2 | Alberto Lim v Colin Sinclair | 7-5,4-6,1-6 | |
| Davis Cup | 11/21 07:35 | 2 | Tenzin Singye Dorji v Colin Sinclair | 2-6,0-6 | |
| Davis Cup | 11/20 07:20 | 2 | Abdulla Faaih Fazeel v Colin Sinclair | 2-6,1-6 | |
| ITF M25 Brisbane | 11/14 01:45 | 26 |
Colin Sinclair v
Jason Kubler
|
4-6,4-6 | |
| ITF M25 Brisbane | 11/13 00:00 | 25 | [330] Emile Hudd v Colin Sinclair [419] | 5-7,6-7 | |
| Challenger Sydney | 10/27 00:40 | 45 |
Colin Sinclair v
Pavle Marinkov
|
6-3,1-6,2-6 | |
| Challenger Playford | 10/21 23:30 | 25 | [409] Masamichi Imamura v Colin Sinclair [383] | 7-6,6-3 | |
| Challenger Playford | 10/21 01:40 | 19 | [363] Colin Sinclair v Thomas Fancutt [134] | 7-6,6-3 | |
| Challenger Playford | 10/20 01:20 | 45 | Colin Sinclair v Charlie Camus | 6-4,6-1 | |
| ITF M25 Cairns | 10/11 01:00 | 27 |
[334] Colin Sinclair v
Blake Ellis
[368] 
|
5-7,5-7 | |
| ITF M25 Cairns | 10/10 02:05 | 26 | [334] Colin Sinclair v Jesse Delaney [385] | 7-6,7-6 | |
| ITF M25 Cairns | 10/08 03:20 | 25 | [464] Jake Delaney v Colin Sinclair [334] | 3-6,7-6,3-6 | |
| ITF M25 Cairns | 10/03 04:05 | 26 | [288] Rio Noguchi v Colin Sinclair [334] | 6-2,6-2 | |
| ITF M25 Cairns | 10/02 01:15 | 25 | Arjun Mehrotra v Colin Sinclair | 6-7,6-7 | |
| Challenger Guangzhou | 09/08 08:35 | 14 | Colin Sinclair v Zhenxiong Dong | Cancelled | |
| ITF M15 Hong Kong | 09/08 02:00 | 29 | Colin Sinclair v Chris Rodesch | 4-6,6-7 | |
| ITF M15 Hong Kong | 09/07 06:45 | 28 | Colin Sinclair v Samir Banerjee | 6-2,7-5 | |
| ITF M15 Hong Kong | 09/06 10:40 | 27 |
[331] Colin Sinclair v
Edward Winter
[315] 
|
6-7,6-3,10-5 | |
| ITF M15 Hong Kong | 09/05 04:25 | 26 | Colin Sinclair v Yan Cheng Chen | 6-4,6-3 | |
| ITF M15 Hong Kong | 09/03 07:00 | 25 | Colin Sinclair v Jimmy Yang | 6-1,6-4 | |
| ITF M25 Hong Kong | 08/29 01:55 | 26 | [352] Woobin Shin v Colin Sinclair [331] | 7-6,7-6 | |
| ITF M25 Hong Kong | 08/28 03:35 | 25 | Ren Nakamura v Colin Sinclair | 6-7,4-6 | |
| ITF M15 Huntsville | 08/15 15:00 | 27 | Colin Sinclair v Leo Vithoontien | 6-7,6-4,5-7 | |
| ITF M15 Huntsville | 08/14 14:00 | 26 | Colin Sinclair v Ilyas Milad Fahim | 6-4,6-1 | |
| ITF M15 Huntsville | 08/13 19:55 | 25 | Colin Sinclair v Kian Vakili | 6-4,7-6 |
Wikipedia - Colin Sinclair (tennis)
Colin Sinclair (born December 19, 1994) is an American tennis player representing the Northern Mariana Islands.
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 four doubles titles on the ATP Challenger Tour. Additionally, he has won three singles and eight doubles titles on the ITF Tour.
He represents the Northern Mariana Islands 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.