Mark McGhee claimed referee John Beaton cost his Motherwell side victory against Dundee at Dens Park.

Dark Blues goalkeeper David Mitchell stumbled over his goal-line as he caught Scott McDonald's 21st-minute cross - but neither Beaton nor assistant referee Ross Haswell signalled for a goal.

Mitchell's whole body was inside the goal and Motherwell went on to suffer more misery as the outstanding Craig Wighton set up goals for Cammy Kerr and Marcus Haber in each half to seal a 2-0 win which lifted Dundee off the bottom of the Scottish Premiership.

McGhee said: "The goal that wasn't given is clearly a goal. There is no doubt. At the time I thought that and, having looked on the camera, it's a goal.

"It didn't cause us to lose the game but I think it caused us not to win the game."

The Motherwell manager's frustration was compounded by the fact Beaton awarded Dundee a crucial soft late penalty in the same fixture last term.

"They don't give you any explanation," he said. "He never gave me any explanation last year when he gave a penalty against Chris Cadden and we drew 2-2 here. The same referee.

"I have to say though, the linesman has got to help him. There are two of them there and they can't see it. I can't understand it."