An entertaining game at White Hart Lane was decided by the defender, who beat Michel Vorm at his near post, as the Eagles reach the quarterfinals for the first time in 21 years.
Martin Kelly's powerful strike sealed a 1-0 win for Crystal Palace against Tottenham in the fifth round of the FA Cup on Sunday.
Palace took the lead just before the interval, when Kelly thumped a shot into the top corner after dazzling skill from winger Wilfried Zaha, and held on to reach the quarterfinals for the first time in 21 years.
Dele Alli almost put the home team ahead in the opening moments but Yohan Cabaye blocked his goal-bound header on the line and Alli later came within inches of scoring when his shot hit both posts.