A late equalizer from French striker Antoine Griezmann gave 10-man Atletico Madrid a precious away-goal advantage over Arsenal as the first leg of their Europa League semifinal at the Emirates ended 1-1 on Thursday.

Arsenal were given a huge boost after 10 minutes when Atletico defender Sime Vrsaljko was sent off for stamping on Alexandre Lacazette's foot, and Atletico coach Diego Simeone was sent to the stands for his furious reaction to the decision.

Arsenal missed a number of clear chances before Lacazette broke the deadlock in the 61st minute, heading Jack Wilshere's cross down into the corner to put the home side in front.

Atletico seized back the initiative in the 82nd minute, however, when Griezmann sped past Arsenal defender Laurent Koscielny, collected his rebounded shot off keeper David Ospina and calmly lifted the ball into the roof of the net.

Meanwhile, in another semifinal Dimitri Payet looked back to his best after setting up both goals as Marseille beat Salzburg 2-0.

Winger Florian Thauvin headed in Payet's curing free kick deep to the back post in the 15th minute, although video replays showed Thauvin headed the ball onto his outstretched hand before it went in.

Still, it was Thauvin's 22nd goal of an outstanding season which has seen him break back into the France squad ahead of the World Cup.

Payet is fighting to keep his France squad place, but another performance like this will make it hard for coach Didier Deschamps to freeze him out of Russia. He was involved in all of Marseille's best moves at Stade Velodrome, and even chased back to harry Salzburg's players.

But he did the most damage with his passing, expertly setting up substitute Clinton N'Jie for Marseille's second goal in the 63rd.

N'Jie had been on the field only a few minutes, but brilliantly took down a pass near the halfway line and flicked it to Payet sprinting down the left. Payet then resisted the temptation to cross quickly, instead waiting for N'Jie to drift into the penalty area before feeding him with a perfect pass to fire home from.

Salzburg beat Marseille at home and drew away in the group stage this season. But the Austrian side did not threaten until the 29th, when a fine run and shot from right back Stefan Lainer forced a smothering save from goalkeeper Yohann Pele.

Midfielder Hannes Wolf almost leveled in the 53rd, but Pele expertly tipped over his rasping shot. Pele had a fine game, rushing off his line to keep out a shot from left back Andreas Ulmer, moments after Ulmer's pass led to Xaver Schlager hitting the left post with a fine half-volley.

The second legs will be played next Thursday, after which the winners will meet in the final on May 16 in the French city of Lyon