Results

Challenger Brisbane 02/09 00:00 19 Jamie Mackenzie v Colin Sinclair 6-2,4-6,4-6
Challenger Brisbane Qual 02/08 00:15 14 Enzo Aguiard v Colin Sinclair 6-7,6-7
Challenger Brisbane 02/02 00:00 19 Shunsuke Mitsui v Colin Sinclair 7-6,6-7,6-4
Challenger Brisbane 02/01 02:35 14 Matsui/Rungkat v Colin Sinclair 3-6,2-6
Challenger Noumea 01/05 03:00 25 [287] Colin Sinclair v Dan Added [201] 3-6,7-6,2-6
Challenger Manama 11/26 07:00 25 Colin Sinclair v Toby Samuel 3-6,0-6
Challenger Manama 11/24 08:25 19 [476] Semen Pankin v Colin Sinclair [259] 6-4,6-4
Challenger Manama 11/23 11:35 14 Elyas Abdulnabi v Colin Sinclair 1-6,1-6
Challenger Brisbane 11/09 02:40 14 Hayden Jones v Colin Sinclair 7-6,7-6
ITF M25 Brisbane 10/29 06:44 - Yuichiro Inui v Colin Sinclair 4-6,7-6,6-4
ITF M25 Brisbane 10/22 22:00 - Colin Sinclair v Alexander Shevchenko View
ITF M25 Brisbane 10/22 00:00 - Colin Sinclair v Alexander Klintcharov 4-6,4-6

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 doubles ranking of No. 200 on 10 April 2023.

Sinclair has won four ATP Challenger and eight ITF Tour doubles titles. Additionally, he has won three singles ITF titles. 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.