Arsenal tasted defeat in the Premier League for the first time since the opening day of the season, losing 1-0 to champions Manchester United at Old Trafford on Sunday afternoon.
Former Gunner Robin van Persie, as he did in last season’s corresponding fixture, gave United a first half lead, and that goal was enough to secure all three points for David Moyes’ men.
The North London side remain top of the division, though their defeat was cut to just two points after Liverpool thumped Fulham 4-0.
Arsene Wenger’s men will now turn their attention to the visit of third place Southampton a week on Saturday.
Meanwhile, the club will reignite their interest in Demba Ba with a £15m bid when the transfer window reopens in January, according to the Daily Star.
They were close to securing a last minute loan for the Senegal international on loan in the summer, on for Mourinho to pull the plug on the deal after Mesut Ozil completed his club record move to the Emirates.
The former Newcastle United and West Ham United forward, who has been used sparingly by Jose Mourinho this season, got his first goal of the season in a cameo appearance against Schalke in the Champions League last Wednesday.