Arsenal hero Martin Keown is worried about their deal for David Luiz.

Keown fears his old club have done Chelsea a favour by paying £8million for the Brazilian.

He told TalkSPORT on Friday: “I was concerned and I made my feelings known at the time.

“I felt that we'd be taking a problem from Chelsea.

“Frank Lampard was in that dressing room wasn't he, and you could say it was a little bit toxic.

"Sarri last year said they were difficult to motivate, and it looks like Lampard has weeded out David Luiz.

“Arsenal are then taking a player with a little bit of baggage."