Oliveira brace for Al Wasl
Al Sharjah climbed to third following a 2-1 win against Al Nasr.
Al Nasr opened the scoring after just six minutes when Iranian midfielder Iman Mobali fired a powerful free-kick from 30 yards past goalkeeper Rashed Ahmed.
Al Sharjah equalised on 29 minutes when Hamid Ahmad crossed for Brazilian striker Marcelio Oliveira to fire home a powerful shot.
Oliveira added his second on 39 minutes when he slotted home the loose ball after Abdulaziz al Anbari's shot was saved by goalkeeper Ismail Rabie.
Elsewhere, Al Wasl registered their first win this season by beating Al Dhafra 2-0. Brazilian Alexander Oliveira opened the scoring on 51 minutes and sealed the win eight minutes later.