Luke Shaw: Man Utd boss Louis van Gaal right about fitness

Manchester United's Luke Shaw has admitted that manager Louis van Gaal was right to question his fitness.

The England left-back, 19, says he underestimated how difficult the step-up from Southampton would be after his £27m summer move to Old Trafford.

Shaw said he "totally agreed" with comments about his fitness made by Van Gaal in a news conference this week.

"To play in this formation you have to be really fit. I am fit but I am not at the high level he demands," he said.

United have adopted the 3-5-2 system with wing-backs used by Van Gaal during the Netherlands' progress to the World Cup semi-finals in Brazil.

"I have got to get fitter to get up and down. It's something I have got to work on," added Shaw, who has been put on a special fitness programme by the United manager.

World's most expensive defenders

Player From To Amount (£m) Date

David Luiz

Chelsea

Paris St-Germain

40

2014

Thiago Silva

AC Milan

Paris St-Germain

36

2012

Rio Ferdinand

Leeds United

Manchester United

33.1

2002

Luke Shaw

Southampton

Manchester United

27

2014

Marquinhos

Roma

Paris St-Germain

27

2013

Fabio Coentrao

Benfica

Real Madrid

27

2011

Pepe

Porto

Real Madrid

25

2007

He only played in Tuesday's penalty shoot-out win over Inter Milan in the International Champions Cup  in Washington because youth product Reece James pulled out of the match with injury.

Shaw says the demands of preparation and training at United were "a surprise".

"I didn't come into United thinking it would be much harder," he said. "That's something I think I made a mistake on."

Shaw, the world's fourth most expensive defender, was as a second-half substitute as United drew 0-0 with Inter before winning a penalty shootout 5-3.

"I felt great. I could have played another 45 so that's something that shows there is a progression there after the last game," Shaw added.

"The focus is now to get fitter and fitter and be flying by the start of the season."

Darren Fletcher

Darren Fletcher scored the match-winning penalty in United's 5-3 shootout success over Inter

Van Gaal reckons his side were good value for their win.

"We deserved the victory, I think," he said. "I am pleased not only because of the way we kept possession, but because of the quality of the opponent."

United now fly to Detroit for Saturday's match against Real Madrid, expected to take place in front of a 100,000 crowd. Real forward Cristiano Ronaldo could be fit to face his former club, with coach Carlo Ancelotti saying the World Player of the Year was recovering well from a knee injury.

The Champions League winners were beaten 1-0 by Roma in Dallas on Tuesday, Francesco Totti scoring the Italian side's winner.

A win on Saturday for United, who beat Roma in their first match, will see them qualify for the final of the friendly tournament on Monday, 4 August in Miami, where they could face Manchester City or Liverpool.