Gabriel Martinelli's goal was enough to help Arsenal extend their lead at the top of the Premier League with a hard-fought 1-0 win at Leicester City.
The Brazilian struck in the first minute of the second half, latching on to a deft pass from Leandro Trossard to roll his shot past Danny Ward.
Trossard had a fine first-half goal disallowed after Arsenal's Ben White held Ward in the build-up.
Arsenal lead Manchester City by five points before they face Bournemouth in Saturday's late kick-off.
Leicester remain 14th.