Roy Keane and Micah Richards row on Sky Sports after Man Utd's defeat to Arsenal

Roy Keane and Micah Richards rowed over Altay Bayindir's culpability for Arsenal's winner against Manchester United.

The United keeper was unable to deal with a first-half corner under pressure from William Saliba and Riccardo Calafiori nodded in on the line at the far post for what proved to be the only goal.

Former United midfielder Keane had no sympathy for the Turk, who appealed for a foul, with the Sky Sports pundit saying: "He has to come with violence, he's got to be aggressive, he's got to be almost saying to players, 'Come in here, I'm happy to deal with it'.

"But he's not strong enough. It's like schoolboy stuff. Don't look at the referee, take control of it."

Fellow pundit Richards, though, argued Bayindir should have been better protected by his defence, saying: "If you look at the balance between Saliba and (Mason) Mount, he's getting ragdolled everywhere.

"I just thought (Matthijs) De Ligt could have come inside and Mount could have gone outside. I agree with Roy, Bayindir should have done a lot better, but when you've got bodies in front of you..."

That prompted Keane to interject, with the pair raising their voices to the apparent amusement of fellow pundit Daniel Sturridge.

"The goalkeeper's on his heels, he should be on his toes. Saliba's doing very little to him," retorted Keane.

"The job of that player in that role is to protect the goalkeeper so he can come and punch it," hit back Richards. "There's a lot of chaos going on."

Keane had the final word, adding: "This is big boy stuff. You can't babysit a goalkeeper. He should go and play chess."

United dominated the chances but were unable to find an equaliser, and Keane did not share in optimism around the Red Devils' start to the campaign.

"The expectations at United now are so low that even when Gary (Neville) is on commentary, everyone's even comfortable with a 1-0 defeat," he said.

"United have got to do better. It does worry me. Obviously, a couple of the new signings, a lot of encouragement with that. Getting up the pitch there was a bit more power.

"Obviously results are going to improve, it's always tough against Arsenal, but again no goal, another defeat. There's still problems there with United."