Alexis Sanchez was delighted with the manner of Arsenal's FA Cup win at Manchester United.
Sanchez believes Arsenal can beat any team if they replicate the robust mentality that characterised their win at Old Trafford.
"It was a very physically demanding game, a box to box one," he told the London Evening Standard. "I got back home both happy and exhausted. The team played the game with a great attitude and with a genuine spirit to win it from the very first minute. We never put our head down against a top club like Manchester United. That attitude gave us the victory.
"We also played like that away at Manchester City. We showed a great winning mentality that day. If we add that to the very talented squad we have we will be able to beat anyone.
"The Champions League race is all down to us. If we want to stay in the top four or climb some places on the table we must maintain the winning mentality. I always say that mentality is a crucial aspect in a football environment. If a footballer goes on the pitch with the right mentality he will perform well."