Andy Murray considered his Zhuhai Open victory over Tennys Sandgren on Tuesday "one of the best wins" of his career.
The former world number one had not won a singles match on the ATP Tour since the Brisbane International in January, announcing his intention to retire and having hip resurfacing surgery in the intervening months.
However, after a successful operation, Murray has been able to return to action, first on the doubles circuit before making his singles comeback in Cincinnati in August.
Not until Tuesday had Murray tasted victory though - and he ranked the gruelling 6-3 6-7 (6-8) 6-1 triumph highly, despite his many achievements on court.
"I think that, in some ways, it's one of the best wins I've had," he said. "Not in terms of just getting through that today, but everything that's gone into getting back to this point.
"You don't necessarily appreciate what it's like to be healthy at the beginning of your career. It's something that you take for granted and it's quite easy, whereas these past few years haven't been.
"Obviously, after the operation in January, it's been difficult and it was undecided at times about whether I wanted to keep going or not, and it's been tough.
"But I'm really glad that I can actually get the win today and hopefully I'll be able to keep going."
Murray was also able to provide a positive update on his fitness following the match, adding: "If I played that match in January, there's no chance I could compete the following day or even two days later. I would be in a lot of pain and discomfort.
"Now, I'm tired and fatigued and muscles and stuff are tired from playing the match. But in terms of how my hip feels, that feels really good.
"So that's very positive and I'm satisfied with that because, in January, I couldn't remember what it was like to play tennis and not have the pain in my hip."
Murray will face seventh seed Alex de Minaur next for a place in the quarter-finals.