And with speculation over Kane and Dele Alli's future, the former Premier League midfielder believes it is the Dane who Tottenham could struggle to hold on to in the near future.
The victory raised Tottenham's hopes of a first trophy since they won the League Cup in 2008.
Two goals from Christian Eriksen and one from Erik Lamela secured a spot in the last four for Tottenham, but the victory was not without controversy as Son Heung-Min's 23rd-minute goal was ruled out for offside.
Wembley is the designated neutral ground for the FA Cup semifinals - and final - but Tottenham is well accustomed to it after taking up temporary residence at the national stadium this season while its home at White Hart Lane is being redeveloped.
Seven straight wins at the Liberty Stadium were soon forgotten as Spurs established a real control on proceedings.
Harry Kane is out injured at the moment, but even in the absence of the England worldwide striker, Llorente can not get into the team.
Eriksen was allowed to advance to the edge of the area by Swansea's retreating defenders before the Denmark playmaker curled a left-foot shot into the corner in the 11th minute.
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Those who have been invited through the first waves of emails also get a few additional codes to share with friends. This also helps you find nearby chests and has been put in place to help for when people are playing with no sound.
The Swansea goalkeeper was beaten again in the 24th minute, but Son was adjudged to be marginally offside - a decision upheld by the video assistant referee - just before firing past Nordfeldt. "It'll be fun to play".
But such was the gulf between the sides, the disallowed goal was scarcely a factor in the result.
The second seemed inevitable and that it took until injury time at the end of the first half was a surprise.
Eriksen said: "It will be weird because it is our home stadium now for the season".
The hosts rallied after the break and visiting keeper Michel Vorm had to be at his best against his former side to keep out efforts from Martin Olsson and Tammy Abraham.
The 2017 summer signing from Swansea has not always played well when he has made appearances for Spurs, and Tottenham legend Hoddle has shared his doubts on the future of the 33-year-old at the North London outfit.