Manchester United forward Anthony Martial left training after just five minutes on Thursday morning.
The Frenchman was pictured arriving at the club's Carrington base in his Mercedes G Wagon but then snapped driving back out shortly afterwards.
Erik ten Hag is preparing his players for Saturday's return to Premier League action against Brighton at Old Trafford.
Martial, 27, started United's last two matches - the 3-2 win over Nottingham Forest and the 3-1 defeat to Arsenal prior to the international break.
In the Arsenal game, Martial was substituted off for new £72million signing Rasmus Hojlund, who is expected to take his place at centre forward when fully fit.