But Stones could only watch as he tried to cut out a goal-bound effort from Ayew which deflected off him and over Howard for Swansea's eventual winner but Martinez refused to look at just one individual player for his team's shortcomings.
"I don't think it's just John. It's as a team and it's a situation where we have to deal with a little bit more control," he said.
"Of course, we all know we have to do that aspect a lot better and I don't think there's any need to get punished the way we did.
"It was very unfortunate the team didn't see the player. We should have been aware and should have seen that area better.
"It's day like today where you see how good we can be and how soft we allow scorelines to go away from us. We need to learn from these painful lessons and become a lot better."