#4 Flop: Calum Chambers
It was a pretty poor showing from Calum Chambers against Southampton at the Emirates on Saturday. The 24-year-old was involved in Southampton's opener when he needlessly blocked Nathan Redmond and was caught sleeping by a quick freekick by Ryan Bertrand which led to a goal.
Apart from the mistake, his overall defensive performance wasn't solid enough and the Englishman was sacrificed for the change in the system at half-time by Unai Emery. The defence has been an issue for Arsenal this season and performances like that from their key defenders isn't going to help their cause.
#3 Hit: Ryan Bertrand
Ryan Bertrand was by far Southampton's best player on the pitch. The 30-year-old was the orchestrator of the Saint's first goal and caught the Arsenal backline sleeping with a quick freekick into the path of Danny Ings, who made no mistake and buried the ball into the back of the net.
The full-back not only had a solid game defensively but also showed great attacking prowess against Arsenal. The Englishman created 3 chances and came away with an assist at the end of the game.