England captain Harry Kane hailed their 2-1 victory over Tunisia as "massive" after he headed home his second goal in stoppage time in their opening World Cup Group G match.

England had made an impressive start at the Volgograd Arena when Kane lashed the home from close range in the 11th minute, but the lead lasted 24 minutes before Tunisia drew level from the penalty spot through Ferjani Sassi.

After struggling to break down the resilient north Africans, England finally found a way through the massed defensive ranks when Kane swivelled to head home in added time.

"It's massive. I am so proud of the lads. We kept going. We spoke a lot about togetherness and we've got a great bond together," Kane said.

The Tottenham striker did feel that decisions went against his side however and twice Kane appeared to be bundled to the ground at a corner, without being awarded a penalty.

"There were a lot of decisions against us and maybe there was a bit of justice at the end," he said. "That's the World Cup. It's tough." 

After Belgium thrashed Panama 3-0 in the other Group G game on Monday, the pressure was on England to deliver only their second win in their last nine games at World Cups.

Manager Gareth Southgate said he would have been proud of his side's performance even if they had not found a late winner.

He said: "The way we kept playing, even though the clock was running down, we stayed patient, we didn't just throw the ball in the box.

"We waited for good opportunities and I think we deserved the win.

"We made so many clear-cut chances, especially in the first half, were in total control of the game in the second half, we were strong on set-plays all night and I'm really pleased.

"I thought even if we'd drawn the game, which I know would have made life more difficult for us, I'd have been proud of the performance."