Arsenal could face a nightmare scenario of finishing in the top four but not qualifying for the Champions League.
The Gunners have improved their chances of finishing in the position behind the trio of Liverpool, Manchester City and Chelsea after three straight wins, including Sunday's 3-2 victory over Watford.
Meanwhile, their nearest rivals Manchester United suffered a disastrous derby defeat to Pep Guardiola's side and the Hammers came up short against the Reds at Anfield.