Sigurdsson is banking on his efforts against the Hammers will prove he can be part of Andre Villas-Boas' future plans.
"After getting the first league goal, I felt about 10 stone lighter than I did before. It is why I came to a club like Tottenham, to play games like the one at West Ham and win them in the last minute," he said.
"I am enjoying it, even though it has been quite tough, especially with me not scoring in the league.
"Hopefully that goal will give me a bit of confidence and luck and I can keep going."