Arsenal came fifth, missing out on the Champions League for the first time in 20 years, and thus go into Sunday's showdown at Stamford Bridge off the back of a Thursday night match against Cologne in the Europa League.
Premier League champions Chelsea are considering to sue Spain International Diego Costa for up to £50million if he does not return to the club. Even the 28-year, who was not named in Chelsea's Champions League squad, has consulted lawyers, according to a report.
According to Oxlade Chamberlain, Antonio Conte requires him at wing-back but the primary reason for him to leave the Gunners is that he wants to play in central midfield. He has shown interest in Jurgen Klopp's side Liverpool.
Arsenal manager Arsene Wenger said, "We have to make a choice between efficiency on the field and financial interests. We want Sanchez to be with us but I'm not sure whether Chelsea want Costa to be with them."