Manchester United legend Roy Keane has taken aim at Manchester City defender John Stones after the 1-1 draw with Borussia Monchengladbach.

Gladbach captain Lars Stindl rolled Stones inside the City half with the 22-year-old hitting the deck after an apparent pull on his arm. Referee Cuneyt Cakir ignored City's appeals for a free-kick as Stindl raced into the box to tee up Raffael to score the game's first goal.

"[For the goal] he's got to be stronger, he's got to be tougher. It's just too easy, he's like a child getting knocked off the ball," said Keane.

"He's hoping one of his team-mates can help him out here but they punished and rightly so. Really poor defending, he's got to be stronger.

"He's a good player but he's just got to be tougher and stronger."