Kane damaged his ankle ligaments for the third time in 18 months against Bournemouth at the weekend and was seen leaving the ground on crutches.
This is the last news fans of Tottenham or England wanted to hear, for it not only damages Spurs' chances of silverware but leaves the 24-year-old fighting a battle to be fully fit for England's summer of World Cup action.
The Egyptian star has matched Harry Kane step-for-step in the race for the Golden Boot, but the odds have tipped in his favour due to the Tottenham star's injury.
Kane turned his ankle in a challenge with Asmir Begovic.
England will face Tunisia, Belgium and Panama in the World Cup group stage in Russian Federation.
The report claims the injury is closer in severity to the problem he picked up in September 2016, which placed Kane on the sidelines for seven weeks, than the last one when he was out for three.
Kane will also have to sit out England's two friendlies this month against Holland and Italy, with manager Gareth Southgate naming his squad on Thursday.
Spurs planned to send him for a scan on the injury on Monday but that was put back as his ankle was too swollen to assess properly.