Barcelona, April 9 -- Atletico Madrid strengthened their hold on the Champions League quarter-final on Wednesday night, securing a 2-0 first-leg win over Barcelona at the Camp Nou courtesy of goals from Julian Alvarez and Alexander Sorloth.

Despite Barcelona controlling much of the game, Atletico's resolute defence and lightning-quick counter-attacks proved decisive after Pau Cubarsi was sent off in the 42nd minute for a last-man foul on Giuliano Simeone.

Julian Alvarez expertly curled a 25-metre free kick into the top corner during first-half stoppage time, sending the packed Camp Nou into stunned silence.

Early in the second half, Marcus Rashford rattled the crossbar from a free kick, but Atletico remained composed and extended their...