Sunderland boss Sam Allardyce admits they targeted Manchester United's flanks for victory on Saturday.
Allardyce revealed that he told his players at half-time to target Man Utd's young full-backs, Donald Love and Cameron Borthwick-Jackson.
“(At half-time I told them to) get the ball into the wide areas quicker and better, because they have two very young full-backs, who are obviously good players but very inexperienced," he said.
“So the quality of our balls has to try and put the pressure on the full-backs with more balls to our wide men."
He added that Sunderland have shown greater resilience in recent weeks.
“We're getting better, we have folded on a couple of occasions when we've lost a goal," he said.
“So we're better, we came back and we're resilient, we were resilient enough today to limit Man Utd to very few chances indeed.
“In fact it was hardly a chance when Martial scored, it was a brilliant bit of skill, it wasn't an easy chance but he popped it in."