At the 53rd minute, Tanganga was shown a yellow card after roughly tackling Zaha when Crystal Palace were on the attack.
Tempers flared and only after the referee intervene did things cool off, but just five minutes later Tanganga made another tackle, this time a mistimed one on Ayew.
Missing the ball, he brought down the Crystal Palace man and without bothering to waste any words, the referee pulled out his cards and showed Tanganga a second yellow, followed by a red.
Things were looking even worse for the already shaken Tottenham side, but they managed to soldier on, doing their best, but their best could only carry them so far.
Things finally came to a head when just 14 minutes to the end of the 90, a cross from Gallagher ended with the ball contacting Davies's arm and the referee immediately blew his whistle, pointing to the spot.
