Kane and Alli will be key players for England at the European Championship this month.
Koeman has some sound advice for the striker and the midfielder, who are 22 and 20 years of age respectively.
“Players like Harry Kane and Dele Alli need to see these finals as the platform where they can step up to a new level and show the world just how good they are,” Koeman wrote in The Mirror. “It’s a different challenge to club football. That’s what Van Basten, Gulllit and Rijkaard did with us.”
Kane is one of the best strikers in the Premier League, while Alli is arguably the best young player in England at the moment.
England are not expected to win the Euro 2016 finals this summer, but the Three Lions will be aiming to reach at least the semi-finals in France.
The Tottenham duo were in great form during the 2015-16 campaign, and they will have to be on top of their game for Roy Hodgson’s side to achieve success in France.
Kane scored 25 goals and created 44 chances in 38 Premier League appearances for Tottenham this past season.
Alli scored 10 goals and created 55 chances in 33 league games for Spurs during the 2015-16 campaign.