After being substituted off in their home draw on Sunday, Arsenal's captain was jeered at by his own team's supporters as he walked off the field, to which he responded with taunts and controversial gestures. Manager Unai Emery has since addressed the bizarre situation.
Click through the gallery above to see Granit Xhaka's reaction to the crowd's boos.
In the 61st minute of the Gunners' 2-2 home draw with Crystal Palace on Sunday evening, midfielder and captain Granit Xhaka was withdrawn and replaced by young Bukayo Saka.
The frustrated 27-year-old headed for the tunnel to jeers from Arsenal's fans, who were perhaps unhappy not only with his performance against Roy Hodgson's troops, but with his general form this season.
As he made his way off the pitch, though, Xhaka threw his arms in the air and reportedly used foul language to provoke supporters at the Emirates, before holding his left hand to his left ear as if to suggest he wanted more of the boos, and then taking off his shirt and making his way straight down the tunnel.
After the game, manager Emery said that what his captain did was wrong.
"He's wrong but we are going to speak inside about that situation," he explained to the BBC.
"I want to be calm but, really, he was wrong in this action."
Xhaka, who registered an assist in the match on Sunday, is yet to comment on the incident.
What do you make of Xhaka's reaction to the boos? Let us know in the comments section below.