Nottingham Forest season ticket-holder Robert Biggs, from Ilkeston in Derbyshire, admitted assault occasioning actual bodily harm which left Sharp requiring four stitches to a wound to his lip.
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Mason Mount’s well-worked opener just before half-time was cancelled out by a bizarre own goal from Antonio Rudiger as Chelsea conceded for the first time in four games under Tuchel.
Chris Wilder’s side had failed to win any of their opening 17 matches of the season – the worst start to a Premier League campaign – but finally came good to leave the pitch with three points in the bag for the first time in six months.
Crystal Palace extended their winning run in the Premier League and moved into the top half of the standings with a 1-0 win over Watford, thanks to a first-half strike from Jordan Ayew at Selhurst Park on Saturday.