P. Karthik defeated Julian Desousa 7-5 7-6 in the M15 Kampala 1 round of 16 on clay. The upset overturned the form book — Julian Desousa came in leading the head-to-head 1–0. P. Karthik claimed a first win over Julian Desousa in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-11-26 | M15 Sharm ElSheikh 18 | Q64 | hard | Julian Desousa | 7-6(7) 6-1 |