The result takes the Brazilians top of the log for the time being, though that could change with the 18h00 kick-off between SuperSport United and Kaizer Chiefs.
It wasn’t the start Pitso Mosimane would have wanted from his side as Arrows threatened early on, with Kennedy Mweene needing to rush off his line to deny Bongi Ntuli.
Man of the Match Siya Mngoma was then called into action at the other end as he got the slightest of touches to direct Khama Billiat’s effort past the post.
Lucky Nguzana then unleashed a snap-shot which went narrowly wide, before Teko Moside fired his free-kick just over the bar following a foul on Billiat which replays suggested took place inside the area.
Arrows had a penalty shout of their own when Rashid Sumalia brought down Nguzana, but it was not given.
Ngoma then blocked well from Wome before doing brilliantly to deny Bongani Zung, but there was nothing he could do on 58 minutes to keep Wome’s shot out. Billiat supplied a clever ball to the midfielder, who switched feet before turning on the ball and firing a special effort into the top right corner.
Cuthbert Malajila was denied in the 67th minute by Mngoma, after which Sundowns continued to press but never really threatened the goal too much.
However, they had done enough for another three points which moves them top, while Arrows are hovering near the bottom, still winless after three matches.