United's boss, about to begin his third season at the helm at Old Trafford, has cut a disgruntled figure during the summer, apparently unhappy with the club's transfer window activity.
"When you look at Manchester City, possibly Liverpool, I don't think they [United] have the quality of those two teams at the minute", Scholes said.
The Reds ended up in fourth place in the table last season and as runners-up in the Champions League after they were beaten by Real Madrid in the final. Like Christmas it just seems to get earlier and earlier every year.
"I'm not confident, I'm not confident and the market closes today, so is time at least for me to stop thinking about the market because the market will be closed", Mourinho said.
City will make late checks on Aymeric Laporte and Benjamin Mendy after they picked up knocks during the Community Shield win over Chelsea last weekend but both players are expected to be passed fit.
"And it is sometimes hard to believe, that I won eight championships and three Premier Leagues but I keep feeling that the second last season was one of my biggest achievements in the game". But they'll want to get the players and team already have to challenge for a top four spot.
Among the players the London club have signed are Issa Diop, Andriy Yarmolenko, Lucas Perez and Felipe Anderson.
United kick off their Premier League campaign against Leicester tomorrow night (8pm).