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Former Arsenal midfielder Merson is critical of the north London side’s failure to sign a proven centre-half to improve Arsene Wenger’s defence.
“I’ll give them an A for attacking because Aubameyang and Mkhitaryan are top, top-drawer players,” Merson told Sky Sports.
“They’ve lost Giroud but getting rid of Walcott was good business in my opinion. But they’ve brought in no defenders and they need a centre-half. How have they not got Jonny Evans out of West Brom?
“I was watching the game against Swansea thinking: ‘You’re going to pay £60m for another centre-forward when you’ve already got a £40m forward in Lacazette, who isn’t going to get a game now?’ I’ll give them a D- for defensive work.”
Arsenal are in sixth place in the Premier League table and eight points behind fourth-placed Chelsea in the race to secure a Champions League spot.