Chelsea slumped to another damaging home defeat against Brentford on Saturday as Eddie Nketiah hit a hat-trick in a 5-0 win for unbeaten Arsenal against bottom club Sheffield United. Mauricio Pochettino's Chelsea appeared to have turned a corner in recent weeks, taking seven points from their three previous fixtures, but their 2-0 defeat means they have just one home win from their past 13 games in the league. Ethan Pinnock took advantage of non-existent marking to head the visitors in front shortly before the hour mark after Chelsea had failed to capitalise on their first-half dominance.