Chelsea moved into the Premier League's top four with a 4-0 demolition of hapless Southampton, but Aston Villa's hopes of Champions League football next season diminished after a 4-1 defeat at Crystal Palace. After a run of three consecutive defeats, Chelsea badly needed a response against bottom-of-the-table Saints, who are set for an immediate return to the Championship. The Blues duly delivered with three first-half goals through Christopher Nkunku, Pedro Neto and Levi Colwill for just a third league win 11 games.