His former coach may be with Tomas Berdych, but Andy Murray played down the impact that would have in the Australian Open semi-finals.
Andy Murray is unfazed by facing Tomas Berdych, despite the Czech being led by former member of his coaching staff, Dani Vallverdu.
Berdych was full of praise for the Venezuelan after ending a 17-match losing run against Rafael Nadal to reach the Australian Open semi-finals.
Murray advanced later on Tuesday with a 6-3 7-6 (7-5) 6-3 victory over Nick Kyrgios on Rod Laver Arena.
The wins set up a blockbuster last-four clash between the two, with Murray's former coach in Berdych's corner.
Asked if it would change his preparation at all, Murray is not convinced it will only be to his opponent's benefit.
"I've always said to people that, you know, watching is one thing and seeing someone's game, but when you actually get on the court with them things are actually a lot different," he said.
"It seems like you might be able to attack certain areas of someone's game or something that they do might look really good, but what matters is when you're on the court can you exploit those things, that weakness.
"That weakness, is it as weak as you think?
"It's completely different when you're out there on the court, in my opinion. We'll see how the match plays out and what the tactics are and stuff.
"But I also know what Dani thinks of Berdych's game because he's told me, so it works both ways."
Murray outclassed Kyrgios in their quarter-final, proving far too good for the 19-year-old Australian.
The two-time grand slam winner mixed up his game with plenty of slices, but said that was down to the wind on court.
"It was a tricky one to judge, to say how well I played, because I found the conditions difficult tonight," Murray said.
"So I tried to use the conditions to my advantage and played a slightly different style than what I had been in the other matches.
"I would say the match against [Grigor] Dimitrov was a very high level. It was a clean match. Both of us were striking the ball well.
"But then tonight, you know, I just tried to play the best with what the conditions were allowing you to do, and I think I did that quite well."