Fernando Verdasco clinched the Kooyong Classic title but Alexandr Dolgopolov looks set to miss the Australian Open.
Alexandr Dolgopolov appears in some doubt for the Australian Open after withdrawing during the Kooyong Classic final on Friday.
The Ukrainian was trailing Spaniard Fernando Verdasco 7-6 (7-3) when he called it quits, citing a knee injury.
Dolgopolov, seeded 21st for the first grand slam of the year, is due to face Italian Paolo Lorenzi in the Australian Open first round.
The 26-year-old underwent knee surgery in 2014, and is worried he may miss the year's first grand slam.
"It's my right knee, I had surgery on it last year and it started to feel the same as before," Dolgopolov told Channel Seven.
"The knee is locked, I'm going to get a scan and I really hope I'll be able to play but I'm not sure of that.
"I'm not really thinking [about my first-round] match, I'm just hoping I can get out on court. That would be good for me.
"It's a pity I need to be scanned and maybe not be able to play, I had good preparation, unfortunately it's like this."
For Verdasco, it marked his second Kooyong title " adding to his 2010 triumph.
The day's other match saw Frenchman Richard Gasquet, who appeared to be feeling his back at times, edge Japan's Kei Nishikori 7-6 (7-4) 7-6 (8-6).