#1 Jordi Alba
The Spanish defender was one of Barcelona's heroes when the Catalans crushed Liverpool by 3 goals at Camp Nou, thanks to his sublime cross which led to Luis Suarez's goal at the 26th minute.
He was all geared up to wreak havoc at The Red's backline once again as he had enough rest and did not have to deal with pesky Mohamed Salah at Anfield. Unfortunately, there was the 20-year-old Alexander Arnold who gave him a nightmare throughout the game.
Alba's woeful defending led to Liverpool's first goal and, he also let Lionel Messi down by missing a sitter before the half-time. He also gave the ball away to Arnold which eventually resulted in the Georginio Wijnaldum's goal at the 54th minute.
He had become the beginning of Barcelona's collapse since Liverpool's second goal, a very contrasting performance from his first leg display at Camp Nou. A wasteful presence up front coupled with erroneous defending has led him into a match to forget at Anfield.