MANCHESTER United midfielder Ander Herrera said yesterday that new boss Louis van Gaal would keep his players’ feet on the ground following their absolute destruction of Los Angeles Galaxy on Wednesday night.

Van Gaal’s first match in charge of United saw Wayne Rooney, Ashley Young and debutant Reece James find the net twice, topped off with a stunner.

Although he did not get on the score sheet, Herrera was United’s best player on the night.

The 24-year-old, who moved to Old Trafford in a £28 million transfer earlier this summer, worked tirelessly from box to box, breaking up attacks and creating openings with incisive passes.

“We are happy with the result but let’s not forget this is a friendly and we still have many things to improve on,” he said.

“Our coach is a very demanding coach, he always looks for only perfection and for that reason he is ideal for a club that always looks to achieve the greatest things, he won’t let us sit back and relax or sit back, we still have a lot to prove.”

United flew to Denver on Thursday 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.