Atletico Madrid took a huge step towards the Champions League semi-finals as Julian Alvarez and Alexander Sorloth scored in a stunning 2-0 win over 10-man Barcelona.

Barca dominated for long periods in the first leg of their quarter-final tie at Camp Nou, which represented the teams' fifth meeting of the season and their second in four days, following the Blaugrana's 2-1 away win in LaLiga on Saturday. 

But the game turned on Pau Cubarsi being sent off for a last-man foul at the end of the first half, with Alvarez brilliantly scoring from the resulting free-kick. Hansi Flick's side continued to press even while a man down, but Sorloth's left-footed finish means they have a mountain to climb if they are to avoid a shock exit.  

Both sides had early opportunities as Juan Musso blocked Marcus Rashford's goal-bound effort with his legs, before former Barca forward Antoine Greizmann was inches away from getting on the end of Ademola Lookman's cross-shot.

Rashford had the ball in the net in the 18th minute, only for the goal to be disallowed for an offside against Lamine Yamal earlier in the move, as Barca started to turn the screw.

But when Atleti came forward against the run of play in the final moments of the half, it resulted in a huge double blow for Barca. 

A VAR review saw Cubarsi sent off after he clipped Giuliano Simeone from behind, denying him a one-v-one with Joan Garcia. From the resulting free-kick 25 yards out, Alvarez whipped a sensational effort over the wall and beyond the dive of Barca's goalkeeper.

Flick reacted by withdrawing Robert Lewandowski and Pedri at the interval, but Barca continued to look dangerous with Rashford their main threat. 

He hit the side netting after being forced wide while rounding Musso, then saw a blistering free-kick – from almost an identical position to Alvarez's goal – tipped onto the crossbar. 

Atleti were struggling to get out of their territory despite being a man up, but they silenced Camp Nou again in the 70th minute, as substitute Sorloth swept Matteo Ruggeri's first-time delivery into the far corner. 

Joao Cancelo hit the outside of the post as Barca continued to throw men forward, and they were applauded off at full-time despite their defeat, though they have plenty of work to do in the second leg next week.

Data Debrief: Cubarsi's historic red costly after weekend controversy 

After Saturday's 2-1 league defeat to Barca, Atleti boss Diego Simeone was furious that Gerard Martin saw a red card – for a studs-up challenge on Thiago Almada – rescinded. 

But another young Barca defender was less fortunate here, as Cubarsi became the first player in Champions League history to be sent off twice as a teenager (also versus Benfica in the 2024-25 round of 16).

Barca still ended the game with 18 shots to Atleti's five, also winning the expected goals (xG) battle by 1.16 to 0.45, but it was the visiting strikers who took their chances.

Alvarez's nine Champions League goals this season are the most by any Atleti player in a single campaign, bettering Diego Costa's return of eight in 2013-14, while he is just the second visiting player to score from a direct free-kick at Barcelona in the competition, after Antonio da Silva for Stuttgart in December 2007.

Super sub Sorloth, meanwhile, has scored six goals in 12 Champions League appearances this season, having only netted once in his first 12 outings in the competition.