The former Republic of Ireland striker was far from impressed with what he saw from the Spurs man.
Former Republic of Ireland striker Tony Cascarino has delivered a damning assessment of Harry Kane's display against Russia, writing in the Times that the Tottenham Hotspur star has just an hour to save his spot in the England starting XI.
Kane looked laboured throughout the Three Lions 1-1 draw with Russia in their opening group match in Marseille, and was a shadow of the player who looked so lethal throughout the domestic season.
There can be a tendency to overreact to such uninspiring displays, but it was undoubtedly a huge blow for Roy Hodgson's side not to see the 22-year-old on top form.
Hodgson is now faced with the question of whether he should persist with Kane, or choose to utilise one of his other striking options, with fellow hotshots Jamie Vardy, Daniel Sturridge, and Marcus Rashford vying for an opportunity.
Cascarino suggests that strength of competition means that the Spurs man cannot afford a similarly below-par performance, and went as far to claim that the striker has just 60 minutes to prove that he is the right man to lead the line for England.
The 53-year-old wrote in the Times: "Harry Kane is one game away from being dropped. International football is an unforgiving stage but that is the reality for the Tottenham striker after he struggled against Russia.
"Having been a star for Tottenham for two seasons he was probably England's poorest player on Saturday. If it's a similar display for the first 60 minutes against Wales he has to be dropped. He has an hour to save his England place.
"With Vardy, Sturridge and Rashford waiting in the wings, Kane must know he doesn't have much time to prove himself in this tournament."
England will be desperate to see Kane hit top for on Thursday afternoon as they take on Wales in their second group game knowing that anything less than victory would be likely to leave them with an uphill battle to secure a top-two spot in the group.