Vidic is backing the Red Devils to fight for Premier League glory if they make a few decent signings.
"I think [Ole Gunnar Solskjaer is] doing a fantastic job," Vidic said. "It seems like everything is positive now.
"Even players who were criticised before, they're different players now. They're playing some great football, and tactically he's done well.
"The players know they are good enough to get into the Champions League. Next year, with a few signings, maybe even challenge for the title. I want us to win that trophy again."