If Mauricio Pochettino is to start Tottenham's new signings, they'll need to be on their game.
Whether the Tottenham Hotspur first team like it or not, the likes of Raheem Sterling and Alex Oxlade-Chamberlain linked up very well with the 22-year-old. And they showed that his confidence and ability in the final third are just as high now as they were several months ago when he was flying high in the Premier League.
Granted, domestic defences have now started to target Kane and there is the argument the Swiss defence wasn't as strong as a top-flight one.
That said, England had struggled to break that very defence down until Kane came on. His performance showed that, with the right service and some quality wingers either side of him, he can still very much deliver.
And that may have done two things. Firstly, it's shown up the performances of Tottenham's wingers so far this season, although that much was already evident. But it's also turned up the pressure on Tottenham's new wide men.
Indeed, Heung-Min Son and Clinton Njie - should boss Mauricio Pochettino choose to play them once the Premier League returns - will have been shown that 22-year-old Kane can still produce top-drawer performances when flanked by quality players. So any inability of Kane's to fire for Spurs will surely raise questions about those around him more than anything.
Those questions won't be asked of Son and Njie but of the likes of Erik Lamela and co - Tottenham's existing front men. But that will only increase the need for the north London side's new boys to hit the ground running.