Success scored his first goal of the season in the previous round fixture against Reading which ended in a 2-0 win for Watford at the Madjeski Stadium.
The 22-year-old forward returned t the starting line up named by Premier League Manager of the Month.
Success who has found game time in the Premier League very difficult to come by took his opportunity to impress the manager in the cup competition.
After a goalless first half Success gave Watford the lead at the Wembley Stadium in the 46th minute converting a ball through to him from Kiko.
Dele Alli restored parity when he converted a penalty after Christian Kabasele was sent off and while Erik Lamela.
thought he had won it, Etienne Capoue scored in the 89th minute to send the game into a shootout.
Success scored his penalty kick as the first taker for Watford but they missed two while Tottenham converted all to advance to the next round.
Since his return to England, Success has been hailed by Gracia following his impressive performancesfor the Hornets and the Nigerian forward will hope to get game time when Watford travel to face Arsenal in a Premier League fixture scheduled for Saturday, September 29.