The heavyweight legend looked in fantastic shape as he went through a sparring session.
Showing he still has power punches, as well as some fleet footwork, he left boxing fans excited that the former world champ could return to the ring.
After the workout, Klitschko turned to the camera and said: "I can't stop it, I don't want to stop it.
"It's the habit, and I love it."
The Ukrainian retired in August last year on the back of a devastating 11th-round KO defeat to Anthony Joshua just four months earlier.
It was mooted that the two would have a rematch before Klitschko hung up the gloves.
But his latest social media post has got boxing fans excited.
Twitter user Nadine wrote: "Wow please come back full time", while Josh Mcullum simply wrote "come back".
Gary Nolan posted that Klitschko "would still beat many of the heavyweights including @BronzeBomber".
Most of the comments are begging him to "come back".
SunSport reported earlier this year how Klitschko's experience was being used by current WBA, WBO, IBF and IBO world champ Joshua.
Speaking to Klitschko in a BBC documentary, Joshua, 28, said: “You experienced everything in your career.
“Your knowledge is like an encyclopedia and is very, very valuable to whoever you pass it on to — hopefully me.
“There’s no one better to get wisdom and knowledge from than yourself.
As the fighters stood in the centre circle at Wembley, Joshua told his new-found mentor: “You’re hired, you’re hired — whatever you want, you’re hired!”
It was also rumoured last month that Klitschko would make a stunning boxing comeback to take on old foe Lennox Lewis.
The veteran heavyweights contested a blood-soaked title war in 2003, with the Ukrainian rescued after six rounds with a savage gash.
But it was later revealed that the two would indeed meet again – in a chess match.
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