My humble opinion.
The contact was there, but it was not strong enough to take him down, as he could have tried to jump him and continue chasing the ball.
They barely touched, so it can be said that he played the "dive" card.... but technically it was not a dive because there was contact between the two.
Anyways, i think it is pretty clear he was looking for the penalty. But this kind of things are part of modern football so...