Arsenal boss Arsene Wenger has questioned defender Andre Santos for swapping shirts with Robin van Persie during the Gunners' defeat to Manchester United on Saturday.
The Brazilian was seen exchanging shirts with Van Persie when the pair left the field at half-time, an incident that has drawn wide criticism from supporters and pundits alike.
"It was not the right thing to do at all," Wenger told reporters when questioned on the issue.
Meanwhile, Theo Walcott has travelled with the Arsenal squad to Germany for their Champions League match with Schalke on Tuesday despite suffering with an illness.
