Sunderland plummet to eight-goal defeat, Chelsea win and Arsenal draw

Ronald Koeman’s dream start as Southampton boss hit new heights as his side soared to their biggest league win against hapless Sunderland at St Mary’s.

Saints’ 8-0 thrashing of the Black Cats eclipsed their previous best, which the club’s official website listed as a 9-3 win over Wolves in September 1965.