Novak Djokovic is the "Joker", but Roger Federer's sense of humour isn't too bad either.
The 34-year-old proved as much at an official ATP event in Monte Carlo, with Andy Murray playing the role of unsuspecting victim.
The Swiss signed an ATP rankings board in Murray's place, scribbling his own signature next to the Brit's face in spot number two. A bemused Murray then had to sign his name next to a picture of Federer - ranked one spot below in third place.
Federer took to Twitter to remind Murray he probably shouldn't turn up late to any future player parties.
The notoriously drab Murray isn't exactly known for his inclination to smile, laugh or show any signs of happiness whatsoever on the court or in press conferences, but he has poked fun at his own reputation several times in various ad campaigns over the years.
Some amusing clips from 2014 involved celebrities reading for the role of the tennis player in a fictional movie about his life, where at one point he tells singer Pharrell Williams his impersonation is off because he's "far too enthusiastic".
We wonder if he'll be plotting any sort of revenge against Federer in the future.
The Monte Carlo Masters will be the Fed Express' first tournament in more than two months as he makes a comeback after undergoing a knee operation in early February.
After hitting for nearly a week at the seaside venue overlooking the Mediterranean, the Swiss said that next week will be key for deciding his further schedule ahead of the French Open - the second major of the season.
"I feel more rust than rest, but I am rested, mentally and physically," Federer said.
"I don't think about the Roland Garros title ... I believe I can do it; every event at the Grand Slam gives me another opportunity to do that.
"I've been training super hard on clay, I'll be able to decide better about playing any of the Masters 1000 tournaments which come later (Madrid and Rome next month) - one, two or even none."
As he prepares for the second round against either Brazilian Thomaz Bellucci or Spaniard Guillermo Garcia-Lopez, Federer will be organising his comeback strategy on the fly.
"If I win the tournament, that changes everything. If I lose in the first match, that changes everything.
"I'll know more in two weeks and I can decide the week before Madrid if I will go there or not."
Federer is seeded third behind Andy Murray and world No. 1 Novak Djokovic, whose confidence and spirits could not be any higher after winning his fourth title of the season a week ago in Miami.
- with AFP