Chelsea completed the signing of Pierre-Emerick Aubameyang on transfer deadline day.

The former Arsenal captain joined Barcelona earlier this year as a free agent, and spent only six months in Spain before returning back to the Premier League.

Arsenal legend Martin Keown has claimed that this signing may go on to affect Arsenal, as Aubameyang will produce the goods for Chelsea.

He told talkSPORT: “I think he’s a top class player. The 13 goals he scored for Barcelona were enough for him to secure Champions League football once more.

“He’s had one issue with Arteta throughout his career. In general he’s been pretty prolific in front of goal.

“He’s been an OK character to work with, Tuchel is saying that himself. Xavi said he was a gift from god when he turned up at Barcelona.

“I think Tuchel knows how to get the best from him they’ve got a special relationship. I hope they got some of that €12m that Barcelona are now getting for him. He was allowed to go there on a free so that’s an even bigger disaster.

“I think he’s going to improve the goalscoring they definitely need a striker. He was quite prolific for Arsenal. This is a top goalscorer there’s no doubt about that.

“In the long-term I do feel he will add something to their attack.

“You’ll have to ask him and he hasn’t given his account of what happened between him and the manager.

“It was personal. He says he’s got unfinished business and he’s here to score goals. I think he’ll be a man on a a mission.”