Sigurdsson was widely tipped to link up with the new Kop boss Brendan Rodgers in the summer after starring for him on loan at Swansea last season.
He believes his team's 3-0 win over Inter Milan in the first leg of their Europa League last-16 clash at White Hart Lane on Thursday proves he made the right decision last summer.
The midfielder said: "If you look at the players we have, they are unbelievable.
"Gareth Bale is one of the best players in the world at the moment and the squad is fantastic.
"It is no surprise we are doing so well and nights like Thursday show I made the right choice."