Eberechi Eze scored his first Premier League goal for Arsenal as the leaders set-piece expertise secured a 1-0 win against his former club Crystal Palace on Sunday.
Eze struck late in the first half at the Emirates Stadium to ensure Arsenal took full advantage of the latest losses for title rivals Liverpool and Manchester City.
The England midfielder had netted just once in 10 previous appearances for the Gunners in all competitions since arriving from Palace in a 60 million 79 million deal in August.