Roger Federer was crowned Wimbledon champion for the eighth time on Sunday afternoon, making him the most successful male in the tournament's long and illustrious history.
The 35-year-old tennis legend went to the Wimbledon champions dinner on Sunday night and partied through the night with "30 or 40 friends".
He arrived at his Monday morning press conference in a little bit of a state, or as much of a state as Roger Federer could ever really be in.
Federer remarkably went through the whole of Wimbledon without dropping a set, comfortably beating 28-year-old Croatian Marin Cilic 6-4, 6-1, 6-4 in the final.
He'll turn 36 in August but is showing no signs of ageing and is currently enjoying his most successful year in tennis since 2009.
Federer's nightmare hangover
It's an accepted truth that hangovers get worse with age and it appears the after-effects of drinking are hitting Federer harder these days.
"My head is ringing," Federer told reporters at the press conference.
"I don't know what I did last night. I drank too many different types of drinks I guess. But after the ball we went to a bar and there was about 30 or 40 friends there.
"We had a great time. I got to bed at 5 and I woke up and I didn't feel good. The last hour I have finally felt somewhat OK again. But we had a good time."
It's almost comforting to know that even the greatest sporting legends suffer hangovers like you and I.
Federer is the bookies clear favourite for the upcoming US Open, despite last tasting success there back in 2008.
Cilic suffers on court
Wimbledon finalist Marin Cilic broke down in tears during the second set of his defeat yesterday.
Treated for a foot injury later in the match, no one seemed to know quite why he was crying but the number six seed explained his emotional state after the match.
"It was just emotionally that I knew on such a big day that I'm unable to play my best tennis, in physical, and in every single way.
"That was just a little bit combination of all emotions because I know how much it took for me to get here.
"It was just a feeling that I knew that I cannot give my best on the court, that I cannot give my best game and my best tennis, especially at this stage of my career, at such a big match.
"It was very, very difficult to deal with it. That was the only thing but otherwise, you know, it didn't hurt so much that it was putting me in tears.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: http://gms.to/writeforgms