Monaco star Fabinho has been caught on camera appearing to storm out of training.
The Brazilian, who has been linked with a move to Manchester United throughout this summer, was filmed leaving the pitch before booting a ball.
He then removed his bib and threw it aside before walking off one of the training pictures as the rest of the Monaco squad continued playing.
It's not clear what happened moments before Fabinho left the pitch, with suggestions he could have suffered a slight injury.
Monaco are keen to keep hold of the Brazilian, given how many players have left the Ligue 1 club this transfer window.
Tiemoue Bakayoko recently joined Chelsea, while Benjamin Mendy and Bernardo Silva both opted to sign for Manchester City.
Thomas Lemar is also being courted by Arsenal, while Kylian Mbappe - the jewel in the Monaco crown - has been linked with a big-money move to Real Madrid.
United were interested in the defender much earlier on in the transfer window, but speculation Jose Mourinho will make a concrete offer has since cooled.
The Portuguese, who recently signed Chelsea's Nemanja Matic, apparently has a preference for Premier League-proven players.
He is said to be reluctant to splash the cash on the Brazilian, who was a vital part of Monaco's excellent 2016/17 campaign.