Ander Herrera is sure Louis van Gaal will do his utmost to keep his Manchester United players grounded after their 7-0 destruction of the Los Angeles Galaxy.

Van Gaal began life as United coach in the best way possible on Wednesday night.

Wayne Rooney, Ashley Young and debutant Reece James all scored twice, and Danny Welbeck also found the net as United crushed the Galaxy in the Pasadena Rose Bowl.

Although he did not get on the scoresheet, Herrera was United's best player on the night. The 24-year-old, who moved to Old Trafford in a £28million transfer earlier this summer, worked tirelessly from box to box, breaking up attacks and creating openings with incisive passes.

Herrera has only been working with his new manager for a week, but he knows Van Gaal well enough to realise he will not let the drubbing get to his players' heads.

"We are happy with the result, but this was a friendly and we still have many things to improve on," said Herrera.

"Our coach is very demanding, he always looks for perfection. He won't let us sit back, we still have a lot to prove."

United tried to sign Herrera last summer, but the transfer fell through. Now the Spaniard is happy to be playing for a club he has watched and admired since he was young. Herrera revealed United icon Eric Cantona was one of his own childhood heroes.

"I liked his character, he was a winner and always worked hard, he never lost one ball and was always thinking about the victory," the midfielder said of the Frenchman, who won four titles in five years at Old Trafford.

Herrera's performance drew praise from compatriot Juan Mata, who also excelled in Van Galla's 3-5-2 formation.

United's record signing expects big things from Herrera, who he knows well from their time together with the Spain Under-21 squad.

The former Chelsea midfielder said: "I have known about him for a while from our days with the Spanish national youth teams and he was very good against the Galaxy.

"We have a good connection on and off the pitch. He can bring great things for us this year."

Mata's January move from Chelsea failed to stop United slipping to a seventh-place finish last year under David Moyes.

The Spaniard is aiming for a much higher position this term.

"Since I was a kid this club was trying to win the Premier league and so we will try to do that this year," Mata said.

United flew to Denver yesterday afternoon to begin preparations for their first game in the International Champions Cup against Roma.

After playing the Italian giants, who have Ashley Cole in their squad, United will travel to Washington DC and Michigan to face Inter Milan and Real Madrid respectively.

If they top their group, United will contest the final in Miami on August 4.