The 22-year-old was afforded the opportunity to lead the Hornets frontline by Javi Gracia and put in a top-notch display, opening the scoring in the encounter.
Since joining the Vicarage Road outfit in July 2016, the forward has struggled to make an impact, scoring once in 20 appearances in all competitions for the side.
In an effort to get more playing time and rediscover his form, he moved to Spanish side Malaga in January on loan but failed to impress.
However this season, he has scored twice in his two starts, in eight games and has promised to continue the form.
“My fitness levels are good and hopefully I will be able to give more to Watford and the fans," Success told Harrow Times.
"Week in week out I want to be part of the team and watch them grow."
On his goal against Tottenham, he said: I think the team geared the game towards me to keep the ball always. I had to make sure they could come up and support and that is exactly what I did.
“I feel I need to give everything. I never stopped, kept pushing until the end and was happy to get the first goal for my team."
Watford take on Arsenal in a Premier League game on Saturday at the Emirates Stadium and Success will be hoping to get a chance to impress.