Bale’s 26th goal of the season was enough to clinch a 1-0 victory over Sunderland on Sunday, however Spurs missed out on fourth place in the Premier League by one point to north London rivals Arsenal.
Their consequent failure to qualify for next season’s Champions League will have given Europe’s elite clubs confidence of being able to poach explosive forward Bale away from White Hart Lane.
But, with a new deal worth around £150,000 per week on the table for Bale, Sigurdsson hopes that will be enough to convince his “irreplaceable” team-mate to stay.
“It’s always very important when you keep good players and he is a fantastic player,” said Sigurdsson.
“If he goes I’m sure the club will get a lot of money for him and hopefully he will be replaced by a few players because I don’t think there will be one player that can replace him. He’s been that good.”