Was this Marko Arnautovic's last appearance in a West Ham shirt?
The Austrian forward started Saturday's 1-0 win over Arsenal amid transfer interest from China.
West Ham have issued a statement insisting their player is not for sale but Arnautovic might have other ideas, judging by his second-half gesture to the crowd.
He appeared to wave goodbye to the home support when he was taken off in the 71st minute and boss Manuel Pellegrini was non-committal over his future after the game.
"We'll see what happens in the next days," Pellegrini told Sky Sports. "We'll see what's best for the player, the club, for everyone."
Watch Arnautovic appear to wave goodbye in the video above.