Mats
Umtiti
Suarez.
Mats because he had 2 key saves in the first half in very tough situations. Umtiti because he was very good overall with very very few mistakes (only 1 IIRC), and Suarez because he wrestled with Atletico's defenders like he's supposed to and got the better of them more than once. Oblak did well to stop him but the header was too close range.