Andy Murray hit back at Fernando Verdasco in a US Open coaching row, stating "I'm off to get a health check as apparently I've started imagining things."
Verdasco ended Murray's grand-slam comeback in the second round on Wednesday, winning 7-5, 2-6, 6-4, 6-4 in Arthur Ashe Stadium.
Murray accused Verdasco of breaking the rules by speaking to his coach in the locker room during a 10-minute break - which the players were entitled to with the heat rule implemented - after the third set.
The Spaniard denied Murray's claim, saying: "I went in, I saw my coach, we didn't talk a word. I just dressed up quickly and went back to the court.
"Obviously, if you say or Andy say that, I don't want to say that he lied, but I didn't talk a word with my coach or any member of my team. I know exactly the rule and I don't want to be the one breaking it."
Murray delivered a parting message after bowing out of his first major since Wimbledon last year.