Justin Barki (born 26 May 2000) is an Indonesian tennis player.
Barki has a career high ATP singles ranking of 1308 achieved on 19 June 2017 and a career high ATP doubles ranking of 403, achieved on 11 December 2017. Barki has won 9 ITF Futures doubles titles.
Barki has represented Indonesia at the Davis Cup.
| {class=wikitable style=font-size:97% !Legend |
| ATP Challenger Tour (0–0) |
| ITF World Tennis Tour (1–1) |
| Hard (1–1) |
| Clay (0–0) |
| Grass (0–0) |
| Carpet (0–0) |
| Loss | 0–1 | M15 Jakarta, Indonesia | World Tennis Tour | Hard | Omar Jasika | 2–6, 3–6 | |
| Win | 1–1 | M25 Hong Kong | World Tennis Tour | Hard | Shin San-hui | 4–6, 6–4, ret |
| {class=wikitable style=font-size:97% !Legend (doubles) |
| ATP Challenger Tour (0–0) |
| ITF Futures Tour/World Tennis Tour (9–2) |
| Hard (9–2) |
| Clay (0–0) |
| Grass (0–0) |
| Carpet (0–0) |
| Win | 1–0 | Indonesia F6, Jakarta | Futures | Hard | Christopher Rungkat | Karol Drzewiecki Maciej Smoła | 6–4, 6–4 | |
| Win | 2–0 | Indonesia F3, Jakarta | Futures | Hard | Christopher Rungkat | Sho Katayama Sho Shimabukuro | 6–3, 6–2 | |
| Win | 3–0 | Indonesia F4, Jakarta | Futures | Hard | Christopher Rungkat | Pirmin Haenle Karunuday Singh | 6–3, 7–6(7–1) | |
| Loss | 3–1 | Indonesia F6, Jakarta | Futures | Hard | Christopher Rungkat | Soichiro Moritani Kento Takeuchi | 4–6, 6–3, 9–11 | |
| Win | 4–1 | Indonesia F7, Jakarta | Futures | Hard | Christopher Rungkat | Shintaro Imai Renta Tokuda | 6–3, 1–6, 11–9 | |
| Win | 5–1 | Indonesia F8, Jakarta | Futures | Hard | Vijay Sundar Prashanth | Sora Fukuda Scott Puodziunas | 4–6, 7–6(7–5), 10–4 | |
| Loss | 5–2 | Indonesia F1, Jakarta | Futures | Hard | Christopher Rungkat | Michael Look Matthew Romios | 6–7(6–8), 6–7(5–7) | |
| Win | 6–2 | Indonesia F3, Jakarta | Futures | Hard | Christopher Rungkat | Francis Alcantara Kaito Uesugi | 6–3, 6–2 | |
| Win | 7–2 | M15 Jakarta, Indonesia | World Tennis Tour | Hard | Ruan Roelofse | Sho Shimabukuro Hiroyasu Ehara | 7–6(7–3), 6–4 | |
| Win | 8–2 | M15 Singapore | World Tennis Tour | Hard | Igor Sijsling | Francis Alcantara Sun Fajing | 6–1, 6–1 | |
| Win | 9–2 | M15 Jakarta, Indonesia | World Tennis Tour | Hard | Thiemo de Bakker | Siddhant Banthia Nitin Kumar Sinha | 6–4, 6–3 |
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