Stan Wawrinka has revealed that he struggled with a panic attack prior to the start of this year's US Open final with Novak Djokovic.
The 31-year-old claimed a memorable four-set triumph over the world number one at Flushing Meadows to secure his third Grand Slam title.
It capped the tournament for the Swiss star, who was pushed all the way by Britain's Dan Evans in round three and played many tough matches before reaching the New York final.
His triumph in the Big Apple means that Wawrinka has now won three of the four 'Slams and only needs to add Wimbledon to his CV to compete his set.
Whether or not he can win at the All England Club may be down to an ability to control his nerves before and during the biggest matches after he confessed to struggling with the mental side of his game ahead of September's showpiece.
In a column for Swiss newspaper Le Matin Dimanche, the Lausanne-born ace said he used unusual tactics to try and settle his mind during the match.
"I was close to breaking point - the moment where you let it all out, physically and nervously," he wrote. "I really felt I was at my limit. Maybe with the heat everyone thought I was perspiring.
"So, how did I do it? I’ll tell you. I hurt myself. I tried to extend rallies as much as possible - one more shot, and another - to make the legs churn and not the head. I pushed myself until I ran out of breath. Past that point the mind isn’t too capable of thinking."