Al Wahda came from behind to defeat Qatar's Al Rayyan 4-3 in their AFC Champions League Group B encounter in Abu Dhabi.
Brazilian winger Leonardo netted all four goals for the UAE side who have moved to the top of the group with nine points from four games.
Al Wahda are currently two points clear of Al Ittihad, who were held to a 1-1 draw by Lokomotiv Tashkent.
Elsewhere, Al Sadd overcame Pakhtakor 2-1 to go top of Group D, while the match between Al Ahli and Persepolis also ended 2-1.
Meanwhile, in Group C, it's a crucial game for 2016 finalists Al Ain, who host Al Duhail at Hazza Bin Zayed Stadium on Tuesday.
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