The fixtures for the semi-final of this year's Europa League have been confirmed, following the completion of Thursday's games.
Arsenal qualified after defeating Napoli 1-0 in Italy. The Gunners had won the first leg 2-0 at the Emirates.
Unai Emery's side will take on Valencia, who saw off Villarreal 2-0 on the night and 5-1 on aggregate.
Chelsea face Frankfurt. The Blues survived a gallant effort from Slavia Prague to win 4-3 at Stamford Bridge and progressed 5-3 on aggregate.
Frankfurt scaled through on away goals. The German side lost 4-2 at Benfica, but claimed a 2-0 win on their turf.
The semi-finals will be played on May 2 and 9, with the final in Baku set for Wednesday May 29.