England striker Harry Kane has said Tottenham manager Mauricio Pochettino texted to congratulate him on the two goals that beat Tunisia on Monday.

Spurs star Kane struck early and again in the first minute of stoppage time as England began their World Cup campaign with a 2-1 victory.

"Poch sent me a text message with lots of love hearts emojis and he wrote: 'Come on, England!'" Kane said after the match. "He is rooting for us. He has a lot of lads in the squad. I get on very well with him. He is my boss, the manager, but he is a friend as well.

"You can see he wants me and the team to do well. It is nice to have that kind of relationship with him."

England captain Kane said he was delighted to have scored after he and the national team suffered a frustrating Euro 2016, going out to Iceland in the round of 16.

"I wanted to make a mark at the World Cup," he said. "I am so excited to be here, but it is about proving a point.

"The 2016 Euro was disappointing for me personally and us as a team as well. It is down to myself to put it right, and there is no better way to start with a win and a couple of goals.

"It was a big day, big night, my first game in the World Cup and two goals, but it can get much better."

After Portugal captain Cristiano Ronaldo hit a hat trick to earn his side a draw against Spain in their opening game, Kane said he wanted to emulate the achievements of both Ronaldo and Lionel Messi.

"I want to prove to myself that I can challenge Cristiano Ronaldo," he said. "Ronaldo is the best player in the world with Messi. The challenge is there.

"To be the best player in the world, you have to aim that high. You can't aim low. You should put no limit to yourself.

"I want to prove a point in major tournaments. I want to be up there with the best in the world. The only way to do that is to perform on the big stage, in the big moments."

Kane said he had not taken advice from Pochettino or England boss Gareth Southgate about how to play in a World Cup.

"As a player, sometimes the less information the better," he said. "Go out there and play your own game, be free.

"That's the message we have tried to get across to the team. We have not done well in recent years and there is not much else than could go wrong.

"So, I would rather come here and attack it, give it everything, score goals, and if we go out, we go out. And if we go through, we go through and we can look at challenges ahead.

"The key is always to believe. As a striker, you never know when the next chance is going to come. You have to stay ready for one opportunity and it can change the game."