United have enjoyed a number of world-class front threes; from Denis Law, George Best and Sir Bobby Charlton to Cristiano Ronaldo, Carlos Tevez and Wayne Rooney.
He said: "It's not new for United.
"Did you not watch Rooney, Ronaldo and Tevez when they were playing, when Sir Alex Ferguson gave them some freedom but within a framework and structure?
"So we do work a lot on patterns and positions and where we want the players to be.
"But within that we understand that you might pop up on the right or the left, or be in different positions, but we have to fill different positions.
"There has been too much, last year, sometimes this year, players who want to gravitate over to the left, and go on there and play tippy-tappy football.
"That's something we wanted to get rid of and we've been more progressive and more disciplined in our positions."