You’re 1-0 up against your North London rivals and holding firm in the face of some second-half pressure – the last thing you want to do is this.
Arsenal had taken the lead against Spurs through Mathieu Flamini’s first-half strike.
Lovely effort from Oxlade-Chamberlain, forces a save from Vorm and Flamini smashes home from close range. pic.twitter.com/oQ89pQFUMQ
— Arsène's Son 🎈 (@hughwizzy) September 23, 2015
But then Calum Chambers, in trying to cut out a Nacer Chadli cross, sent the ball past his own goalkeeper.
It’s David Ospina who we feel the most sorry for.