Scotland Premiership

Arsenal, Chelsea, Valencia, Frankfurt in Europa League SFs

Chelsea scored three early goals before surviving a second-half scare to advance to the semifinals of the Europa League on Thursday with a 4-3 home win over Slavia Prague, and Arsenal beat Napoli 1-0 to make the last four for the second straight year.

In the other second-legged quarterfinal games, Valencia won 5-1 on aggregate after defeating Villarreal 2-0, and Eintracht Frankfurt overturned a two-goal deficit from the first leg. The German team went through on away goals following a 2-0 home victory over Benfica and 4-4 overall.

Chelsea enjoyed a 4-1 lead at halftime before conceding two goals after the interval for a 5-3 aggregate win. The London club equaled Atletico Madrid's record run of 15 unbeaten games in the competition.