Nigeria, March 2 -- 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 equalise...