Andy Murray admits he was distracted by what he believed was Novak Djokovic cramping during his Australian Open final loss on Sunday.
The Brit went down to Djokovic in the decider in Melbourne for the third time, suffering a 7-6 (7-5) 6-7 (4-7) 6-3 6-0 loss on Rod Laver Arena.
Djokovic had appeared to be struggling with a left leg injury at the start of the second and third sets.
But the world number one shook off whatever the concern was, reeling off 12 of the last 13 games.
Murray said his opponent's apparent physical problems had affected him.
"The third set was frustrating because I got a bit distracted when he, like, fell on the ground after a couple of shots," he told a media conference.
"It appeared that he was cramping, and then I let that distract me a little bit.
"That's what I'm most disappointed about, not so much the fourth set because I think, especially at the end of it, he was just going for everything, and it was going in.
"But the third set was more frustrating for me."
Murray had his chances, leading in the first-set tie-break and almost going up a break in the third.
Asked if he felt Djokovic was deliberately feigning injury and using it as a tactic, Murray said he was unsure.
"I don't know. I don't know. I have no idea. I mean, it's obviously what he thinks. I would hope that that wouldn't be the case," he said.
"But, yeah, if it was cramp, how he recovered from it, that's a tough thing to recover from and play as well as he did at the end.
"So, yeah, I'm frustrated at myself for letting that bother me at the beginning of the third set, because I was playing well, I had good momentum, and then just dropped off for like 10 minutes and it got away from me.
"So that's the most frustrating thing because I thought I obviously had opportunities in the first set. I couldn't quite get them. I managed to sneak the second.
"Then obviously was that break up in the third. So, yeah, there was definitely opportunities there."