Granit Xhaka apologised to Arsenal teammates at halftime of victory over Tottenham.
The Gunners made it seven wins from eight Premier League matches with a 3-1 win over rivals Tottenham at the Emirates.
The incident in question came during the build-up to Tottenham's equaliser from the penalty spot.
Xhaka failed to clear his lines moments before Gabriel brought Richarlison down inside the area.
And Anthony Taylor gave the penalty, before Harry Kane dispatched beyond Aaron Ramsdale.
The Daily Mail says Xhaka took responsibility for the goal when the players went in at the break.
He then went and atoned for the error in the second period, scoring Arsenal's third as they finished off the 10 men of Spurs following Emerson Royal's dismissal.
