I've watched the Dias/Jesus incident back a few times now, it seems to me that Dias loses sight of where the ball is, moves to his right slightly and just catches Jesus's trailing leg, enough to bring Dias down, but Jesus then does a rather theatrical swan dive, I'm pretty sure he could have stayed on his feet if he'd wanted to. I don't know why the Ref didn't give a yellow to either player, I think he could have given them both one (Dias for the challenge, Jesus for the theatrics alone never mind waving), but it was 20 seconds into the second half, it would have meant a red for Dias who was already on a yellow (and a soft one at that), it wasn't close to goal, and there were other defenders, Referees just don't like sending players off in those circumstances, I think the earlier booking was probably the deciding factor, but I think the Referee got that incident about right.