Can you spot why this Wimbledon photo sent fans wild?
It looks like nothing more than an ordinary photo of Rafael Nadal tuning up for the second week of Wimbledon with an off-day practice session.
But a closer examination reveals a rare event that made Middle Sunday at the All England Club that little bit more special.
The world No.1 Nadal is on the court closest to the camera.
To his left? None other than Novak Djokovic.
And one court over on the opposite end? Yep, Roger Federer.
Mid Sunday practice @Wimbledon with some know guys sharing the three courts 😉 pic.twitter.com/ZIZmeXRFpS
— Rafa Nadal (@RafaelNadal) July 8, 2018
Thirteen Wimbledon championships between them and 49 grand slam titles overall, it was quite the historic training run.
Tennis fans took notice:
The father… the son…and the holy 🐐
— Lungani Zama (@whamzam17) July 8, 2018
Greatest three players of all times 🔥
— 🇫 Fatoş (@fatoscakrca) July 8, 2018
Just wow. Too many Grand Slams in such a tiny corner at the same time. #Wimbledon https://t.co/Di4d2YAVWs
— Franz (@silalahifranz) July 8, 2018
3 Greats in 3 Courts…wonderful to see…looking forward Big3 in SF
— Arun (@ArunkumarKrish) July 8, 2018
This is greatness in 1 picture
Roger Federer – 20 grand slams
Rafael Nadal- 17 grand slams
Novak Djokovic- 12 grand slamsThat's 49 between the 3 of them and I have no doubt it'll become 50 at the end of Wimbledon
🐐🐐🐐#wimbledon2018#Wimbledon https://t.co/vyLPahXbvt
— Waseem Minty (@waseem_minty) July 8, 2018
All three players were warming up for ‘Manic Monday’, when all fourth-round matches in the men’s and women’s draws will take place after Sunday’s rest day.
Federer is up first, at 1pm local time on Centre Court, against Adrian Mannarino while Nadal will close the day’s play inside the 15,000-seat stadium against Jiri Vesely.
Djokovic, seeded 12th following time off with injury, will play Karen Khachanov last on the 11,000-seat No.1 Court.
Nadal and Djokovic could face off in the semi-finals, while Federer is aiming to get out of the top half of the draw to reach a 12th final at the All England Club.