Arsenal boss Arsene Wenger has hope of Alexandre Lacazette being back in action inside a month.

Lacazette has posted an update on his rehab after Wenger confirmed he will be out for four or five weeks after minor surgery on his knee.

The Frenchman was injured during Arsenal's 1-0 defeat to Tottenham in the North London derby 10 days ago, when he missed a couple of huge opportunities to get the Gunners back into the game.

After keyhole surgery on his left knee, the striker, 26, has posted an update on social media with his feet on a leg press machine in the gym, showing that he has already begun his rehab on the joint.

Wenger told BeIN Sports: "He got a surprising swell of the knee after the game against Tottenham and he needed surgery very quick.

"He'll be out for the next four to five weeks. It's a massive blow for us and we have to find a solution because nobody could predict that."