Arsenal forward Theo Walcott was seemingly caught up in a post-match altercation with the club's supporters after the embarrassing Champions League defeat to Monaco.
The FA Cup holders' hopes of reaching the quarter-finals were dealt a huge blow after the 3-1 loss to the Ligue 1 side, courtesy of goals from Geoffrey Kondogbia, Dimitar Berbatov and Yannick Ferreira Carrasco.
After the full-time whistle, the England international shared a warm embrace with Tunisian defender Aymen Abdennour - before swapping shirts with the 25-year-old.
Following the stunning defeat, which leaves their Champions League aspirations in tatters, some members of the Emirates Stadium crowd stayed behind to vent their frustrations at Walcott.
The former Southampton forward then apparently responded by gesturing towards the Gunners' fans with a hand gesture to suggest the criticism did not affect him.
Walcott's teammates were booed off the pitch after a timid defensive display which manager Arsene Wenger has since described as 'suicidal'.
After falling behind to a stunning Kondogbia strike in the first-half, long-term transfer target Berbatov then doubled Wenger's woe before Alex Oxlade-Chamberlain appeared to give the hosts a glimmer of hope.
That was quickly extinguished, however, as Arsenal were caught on the counter-attack in the closing moments by Ferreira Carrasco's late strike.
The Gunners now have to travel to France in three weeks' time knowing they need to overturn the deficit and score at least three away goals if they are to progress to the next round.
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