"It's important that the players represent their countries and we want them to do well," he told MUTV. "When they are competitive matches we don't have any complaints because every player at our club is conscious of the fact that they have important games coming up.
"England are in a safe situation but still need those three points just to get over the line. Therefore, they will want to win. Most of the other sides need to win their games. Patrice Evra is with France, and Nani is with Portugal and they both need to win their games."
United's training headquarters at Carrington will be much quieter than usual, but Sir jokes that the usual members of the old guard - Ryan Giggs, Paul Scholes and Gary Neville - "will hold the fort while everyone else is away."