I've had several looks at the gif... I think Colo was expecting Suarez to control it and he wanted to close down fast or at worse take a foul on that play. Suarez caught him by surprise with a quick pass and obviously Colo being a football player himself never wants to hurt a fellow professional, tucks his leg under him and his momentum takes Suarez out. Red Card? From the momentum and Suarez's reaction, it's definitely possible to be given by some refs.
Oooooh... So we just needed to playing our youngsters so they could go in hard... Got it! Didn't realise that was a rule 