The former Everton striker feels that if Kane gets injured Spurs' title hopes are over.
Tottenham Hotspur are in a title hunt this season. Mauricio Pochettino's men have been excellent this season and their consistency has paid off. They moved up to second in the Premier League with a won against Watford last weekend and are now breathing down the necks of surprise leaders Leicester City.
Spurs do however have the FA Cup and Europa League to compete in, which is being earmarked as the big potential stumbling block to their title hopes.
One Sky Sports pundit however thinks the fitness of Harry Kane is the key to their potential title fight.
The England international striker has been in great form this season and is scoring the goals that are taking Spurs to a potential title win.
However, if he gets injured Spurs have no out and out strikers to take his place.
"The biggest concern and the biggest worry, you talk about (Jamie) Vardy. If Vardy was to get injured at least they (Leicester City) have got (Leonardo) Ulloa, (Shinji) Okazaki. They might not be as good as Jamie Vardy but if Harry Kane get's injured for Spurs, who on earth is going to play up front for them?
"They have put themselves into a great position - they are serious, serious title contenders this year. But they have to keep that man fit. If he gets injured then you can kiss goodbye to Tottenham's title chances.
"They will not win it without a fit Harry Kane, that is how vital he is."
Spurs tried to bring in Moussa Dembele of Fulham in the winter window but the deal ended up falling apart at the last minute. Continued links with Saido Berahino also failed to materialise as anything concrete.
Heung-min Son can play as a striker, as can youngster Josh Onomah. Meanwhile Erik Lamela and Nacer Chadli have moonlighted in the past, but Clinton N'Jie remains sidelined.
So there is no doubt that Kane needs to remain fit if Spurs are to win the Premier League title this season.