Arsenal tightened their grip on the Premier League title race with a crucial 2-1 victory over Chelsea in a fiercely contested London derby at the Emirates Stadium on Sunday. Nigeria’s Alex Iwobi also delivered another standout performance as Fulham defeated Tottenham Hotspur in a separate all-London clash. At the Emirates Stadium, Mikel Arteta’s men once again showed their strength from set-pieces. Both Arsenal goals came from corners, underlining their growing reputation as one of the league’s most dangerous sides from dead-ball situations. The Gunners had to work hard for the win, as Chelsea enjoyed long spells of possession and tested Arsenal’s defence repeatedly. Chelsea thought they had snatched a late equaliser in stoppage time, but the goal was ruled out for offside after a revie...