Harry Kane admits it has been difficult to play so much football since the summer - but the England captain insists his game has not suffered as a result.
If Kane does not score in Monday's game against Spain in the same competition it will be the longest barren run of his senior England career - his last goal came against Colombia at the World Cup.
There has been widespread suggestion that Kane is in need of a rest as the burden of firing both club and country to glory has taken its toll, but, while Kane admits it has been a slog, he believes he remains at the peak of his powers.
"I don't think my game has dipped," he said. "It's been tough after the World Cup not getting much rest, but I think I dealt with it well. I've stayed fit and stayed healthy.
"That was my main priority at the start of the season. Now it's building on that and pushing forward over the winter.
"I set a standard for myself and I want to reach that standard every game I play. Sometimes you fall below it for one reason or another. It's about learning and improving and that is what I will do for the rest of my career.
"I just stay focused on my job and what I need to do. In the Premier League I'm second top goalscorer. I'd like to have scored more for England recently."
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Cardiff have appealed against Joe Ralls' red card at Tottenham.
Ralls was sent off by referee Mike Dean for a 58th-minute tackle on Lucas Moura in Saturday's 1-0 Premier League defeat.
Press Association Sport understands an appeal was lodged with the Football Association before the 1pm deadline on Monday.
Cardiff manager Neil Warnock, in his post-match Wembley press conference, branded the decision as "very soft" and accused Spurs striker Harry Kane of "trying to make an issue of it" after squaring up to Ralls.
"You don't go off like that. He (Kane) is doing that to make an issue of it, to get the referee thinking (it was) worse than what it is," Warnock said.
"England player going off like that, dear me. He went straight in and pushed him. Why not give him a red?
"I don't think you should try to get other pros sent off, just because he's had a poor game and Spurs were having a poor game. He shouldn't take it out on us."
Ralls faces the prospect of a three-match ban and will miss games against Fulham, Liverpool and Leicester if the appeal is unsuccessful.
Cardiff are currently bottom of the Premier League with two points from eight games.
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Jurgen Klopp insists Harry Kane and his England team-mates may suffer from a lack of rest following their World Cup exploits.
Kane is likely to lead the line for Spurs when they host Klopp's Liverpool on Saturday as the Premier League returns after the international break.
The England captain has scored twice for club and country since the start of the season and has yet to hit the heights seen in recent years.
But Klopp feels England's progression to the World Cup semi-finals meant plenty of players were not afforded adequate recovery time.
"We all knew it after the World Cup, especially after England came that far, they have had no rest," he told Sky Sports News.
"Harry played from the first match on, so maybe he had two weeks holiday - that is nothing," added Klopp.
"He is a physical worker, he uses his body every day. He cannot get a rest match-wise but he will find his form and maybe at the weekend."
Klopp, whose side have won their opening four Premier League matches of the season, went on to suggest too much is asked of today's players from a physical perspective.
"A good pre-season should be at least three or four weeks," he said. "That is how it is, the body needs the time only to calm down from an intense season - they didn't have it.
"We ask too much from the players, we constantly want them ready and if they are not we are not happy. It is a weird situation.
"Now with the Nations League, international managers cannot rest players because it is a proper competition. It is a constant challenge for all of us, we will deal with it and it will never be perfect."
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