When Umtiti breaks the lines and follows an opponent to intercept, Pique has to adjust his positioning. That sometimes doesn't happen and a large gap is created.
It's nice that Umtiti is proactive and doesn't wait guarding space but pushes forward, but these moves you either do them right, or don't do them at all and defend more traditionally, staying in your zone even if nobody is there and wait for the action to get to you.
Rakitic was passive and had an easy first half. People were praising him for not screwing up basically. He's just done here. He offers nothing. A liability and waste of space.