An inspired Alexis Sanchez performance guided Arsenal to a crucial 3-2 away win at Crystal Palace on Thursday night.Arsene Wenger, taking charge of his 810th Premier League game, desperately needed a win to keep the pressure on Tottenham and Liverpool in the battle for top four.The Gunners took the lead through Shkodran Mustafi but Andros Townsend fired in an equaliser early in the second half.A brilliant four-minute brace by Alexis Sanchez secured all three points for Arsenal, despite a James Tomkins header setting up a nervous last few minutes.Sanchez has only six months remaining on his current deal at the Emirates and Wenger commented on the 29-year-old's future in his post-match interview."I am not fearful but as you said that will be a subject that arises because of his contractual situation," said Wenger after Arsenal's win at Palace."I never questioned his commitment but when you have his contract situation and have as a good a game, people question you. I can only repeat what I have said until now."

Gooners destroy one man

Despite scoring three times for the second game in a row, Arsenal fans on social media were not particularly impressed by their side's performance at Selhurst Park.

Spanish full-back Hector Bellerin received much of the criticism on Twitter following his display on the right flank.

The 22-year-old, who was signed from Barcelona as a teenager, has little competition at the club following the £35m summer sale of Alex Oxlade-Chamberlain to Liverpool.

With Maitland-Niles being used at left-back, they might change their minds when they realise that Mathieu Debuchy is Bellerin's back-up.

Legendary Arsenal right-back Lee Dixon recently criticised the young Spanish international and suggested that he needs to focus on defending.

“If you take a step back from that and analyse him as a player, then he has got a huge amount to learn," said Dixon, as per The Mirror.

“His defensive abilities are way below his attacking abilities and as a full-back, that’s not the correct balance. He has got to learn and correct that balance himself.

“It is only natural that a young player has a drop in form. The fact that he was so good and he has now dropped in form and dropped below those standards, people are suggesting he’s ‘bad’ now."

Bellerin is yet to miss a minute of Premier League football this season and is expected to be in the XI when the Gunners visit West Brom on Sunday.