The England striker was United’ top scored last season with 23 goals.
Fergie said: “He just loves football and loves training and he will be a big player next year, believe me.
“He will have a great season, because he’s had a proper pre-season for the first time with us. He will be fine.”
He added: “Nothing bothers Rooney. He is incredible, a very strong character.
“Wayne is exceptional. He gets up and is the first in the training ground every morning.
“We like the players to come in for breakfast and he is in at 8.45am, the first there. Unbelievable.”
