Chelsea ended their three-match losing run with an emphatic 4-nil victory over bottom side Southampton.
The result has taken them back into the Premier League's top four.
Boss Enzo Maresca says it was an important win.
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Brighton made it four wins from four by beating Bournemouth 2-1.
Crystal Palace defeated Aston Villa 4-1 while Fulham were 2-1 winners at Wolves.
