World number one Novak Djokovic and Russia's Maria Sharapova were among the tennis stars to be amazed by the tricks and skills of Stefan Bojic.
The trick artist from Serbia playfully demonstrated how to improve coordination and control of the racket in a new video published on 22 May.
Sharapova and Serbia's Djokovic were not the only ones to take part in the master class; Briton Andy Murray, Czech Tomas Berdych, American Sloane Stephens, Spain's Fernando Verdasco, Richard Gasquet of France and Australian Bernard Tomic also took part.
At the end of the video Bojic amazes Djokovic when he demonstrates his full repertoire and the world number one drops his racket in astonishment.
The players might show off some of their new skills at the French Open which begins on Sunday (24 May).