1st(1st leg) Olympique Marseille - RB Salzburg 2:0 (1:0)
2nd (2nd leg) RB Salzburg - Olympique Marseille 2:1 (0:0, 2:0) aet
1st(1st leg): 26/04/2018 20:05 2nd (2nd leg): 03/05/2018 20:05 Winner: Olympique Marseille
1st(1st leg) Arsenal FC - Atlético Madrid 1:1 (0:0)
2nd (2nd leg) Atlético Madrid - Arsenal FC 1:0 (1:0)
1st(1st leg): 26/04/2018 20:05 2nd (2nd leg): 03/05/2018 20:05 Winner: Atlético Madrid