Andy Murray says he still believes he can "compete at the highest level" after battling past Christopher O'Connell in round one of the Dubai Tennis Championships.
The Briton, 34, fell behind against the world number 158 but won 6-7 (4-7) 6-3 7-5 in two hours and 51 minutes.
Murray, who had major hip surgeries in 2018 and 2019, saved seven of eight break points to stay in the match.
"I enjoyed the result. What went on the middle, not so easy," he said.
The world number 89 continued: "I was very frustrated early on in the match, I couldn't quite find my game.