On fire so far this season, Sonny's wonderful second goal at Middlesbrough took the award from his second goal at Stoke as fans had their say here on tottenhamhotspur.com and via social media.
Sonny looked crowded out as he dribbled into Boro's box at the Riverside and even appeared to lose the ball at one stage, but he won it back before angling an arrow of a drive that whistled into the top corner.
Below: Watch Sonny's cracker at Boro - your Under Armour GOTM for September!
That goal polled 41% of fans' votes, followed by 30% for his first-time curler at Stoke.
Christian Eriksen's beauty against Gillingham was a close third.
UNDER ARMOUR GOTM - SEPTEMBER
HEUNG-MIN SON second goal v Middlesbrough - 41%
Heung-Min Son second goal v Stoke - 30%
Christian Eriksen v Gillingham - 23%
Dele Alli v Stoke - 6%
Thanks for your votes!
All voters on tottenhamhotspur.com went into a prize draw and the winner of the Under Armour goody bag will be notified soon.