The England player has returned from a week of intensive training in the United States after being sidelined with an ankle injury.
GEAR:Kitbag's Christmas Shop now open. Save 10% on shirts, boots, balls & equipment
"We have to see if he's ready for the first team," Ferguson told a sports conference in the Qatari capital Doha on Wednesday.
"The only evidence we will have is on the training field and I'll see that tomorrow (Thursday)." United, who are third in the table and three points behind leaders Chelsea after 13 games, meet struggling Wigan on Saturday aiming to make up for the two points they dropped at Aston Villa in a 2-2 draw last week.
"Wayne has had a good week in Oregon. He's done well," added Ferguson.
"The boy rushed in," said Ferguson. "The minute the... supporters and press had a say, he changed his mind immediately because he knew he made a mistake.
"He immediately apologised and agreed a new contract in a couple of hours. We want to get Wayne to his best. When that happens everything will be OK."
