Arsenal fans accuse Alexis Sanchez of stifling laughter during humiliating 5-1 loss to Bayern Munich

Talking points: Unsettled forward Alexis Sanchez was accused by fans of laughing during the humiliating loss, as his compatriot Arturo Vidal shone in midfield for Bayern Munich

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Alexis Sanchez was angrily accused by some Arsenal supporters of laughing during the club’s humiliating 10-2 aggregate defeat to Bayern Munich on Tuesday night.

Sanchez was involved in a training ground dispute with Arsene Wenger last week and was dropped for the 3-1 Premier League loss to Liverpool. He was recalled for the Champions League match against the Bundesliga champions but withdrawn for Lucas Perez after 73 minutes.

Not long after taking his place on the substitutes bench next to Petr Cech, BT Sport footage appeared to show the forward stifling a smirk with his hand.

It is unclear what prompted the 28-year-old to laugh, but the timing could not have been more unfortunate and many angry Arsenal fans immediately began to call his commitment into question on social media.

“Arsenal have been battered 10-2 and yet the most embarrassing thing of the night is Alexis Sanchez laughing at his own team,” wrote one. “He’s clearly going to leave in the summer,” added another.

BT Sport pundit Rio Ferdinand after the match that he also expects Sanchez to leave in the summer transfer window.

"I don't think this guy's going to be here next season,” he said.

“He's not going to sit there and say 'this is for me.' He will look at the gulf in class and think 'I'm not going to win anything here'”.

Man of the match

Arturo Vidal dominated the middle of the park (Getty)

Arturo Vidal: Unlike his international team-mate Alexis Sanchez, the midfielder controlled the tempo of the game and was a key component to helping his side ride Arsenal's early onslaught. Vidal was also rewarded with a brace late on as Bayern won the midfield battle due to the presence of the 29-year-old.

In with the crowd

Arsenal fans held an anti-Arsene Wenger protest outside Highbury (Getty)

Pre-match protests outside the old Highbury home against Arsenal's hierachy and Wenger set the tone for Tuesday evening's Champions League tie as the Emirates Stadium was sparsely filled ahead of kick-off.

Bayern fans caused an early delay in play after toilet paper was thrown onto the pitch. Referee Tasos Sidiropoulos held up play and restarted the game once the affected corner of the pitch was cleared.

Despite many fans leaving the match after Robben put the visitors 7-2 up on aggregate, home supporters were on hand to give Sanchez a standing ovation when the Chilean was substituted. Chants of "F*** off Stan Kroenke, get out of our club" rang round the stadium from a section of Arsenal fans. A streaker from the crowd brought the home fans to their feet late in the game.

Ref watch

Tasos Sidiropoulos had a mixed evening (Getty)

Referee Tasos Sidiropoulos' decision to send off Arsenal defender Koscielny all-but ended the home sides' hopes of mounting any sort of comeback in the second half.

Sidiropoulos had initially shown Koscielny a yellow card but after consulting with one of his additional assistant referees, the Greek referee suddenly changed his mind and gave the Frenchman a straight red card.

Beforehand, Sidiropoulos failed to award Arsenal what looked to be a clear-cut penalty following Xabi Alonso's clumsy challenge on Walcott. Every single decision made against the hosts was lambasted and answered with a loud sound of jeers from Arsenal supporters.

Tweet of the evening

With additional reporting by PA.