A goal down in that game, Harry Redknapp's side secured the points at the Britannia Stadium thanks to a brace from Gareth Bale.
In between his efforts Stoke equalised through Ricardo Fuller and thought they had drawn level for the second time in the dying embers of the game. However, Foy allowed play to continue even though a shot from Jon Walters, on his debut, appeared to go over the line.
He ignored all the protests and despite an encouraging second half display Stoke suffered their second successive defeat.
They almost took the lead inside two minutes after good work by Walters following his arrival from Ipswich in midweek.
He made space down the right and delivered the ball into the area. However Michael Dawson made a crucial interception with Fuller ready to pounce.
Tottenham made the breakthrough in the 20th minute with Bale at the heart of things. The Wales full-back cracked in a shot that was blocked by goalkeeper Thomas Sorensen.
Peter Crouch was first to react but his effort came back off Ryan Shawcross. However, to the Stoke skipper's horror, his clearance went straight to Bale who headed home.
Stoke drew level in the 25th minute with Tottenham guilty of poor defending. Younes Kaboul directed Matthew Etherington's corner into the area and Fuller clipped a shot beyond Heurelho Gomes.