Murray blamed the increased tensions on the media's focus on Vallverdu's departure from his entourage last month.
"When there's a lot of tension surrounding something, which [the media] created, then it's completely normal that everyone was tight for the whole of the first set," Murray said. "My physical trainer, my physio, I'm sure for Dani it was uncomfortable. Even Tomas, who very rarely says anything on the court, there was tension there for him as well. In the heat of the moment you can say stuff you regret."
As for the incident at the end of the first set, Berdych claimed that he had simply said to himself, "Well done, Tomas". Murray did not hear exactly what Berdych had said but he complained to the umpire, who in turn questioned the Czech.
"Do I have to be worried about every word that I'm going to say?" Berdych said afterwards, insisting nothing of any consequence had been said or done. "I just pumped myself up for winning a first set. That's it. Then I sat on the chair."
Murray said he regretted the fact media interest in Vallverdu meant his coach Amelie Mauresmo was not getting the credit she deserved.
"A lot of people were also criticising her at the end of last year, saying the way I was playing was her fault, when I'd spent only two weeks training with her up to the training block at the end of the year. You can't change things during tournaments. There was very little time to spend with each other."
The Scot drew praise on social media for his comments about women coaches in his on-court interview. "So far this week, women [have shown they] can be very good coaches," he said. "Madison Keys, who reached the semis here and had her best tournament, is also coached by a woman - Lindsay Davenport - and I see no reason why that can't keep moving forward like that in the future.
"I'm very thankful to Amelie for doing it. It was, I would say, a brave choice for her to do it and hopefully I can repay her in a few days." Independent
