Manchester United legend Teddy Sheringham says he "wouldn't be surprised" if his former club made "two big January signings".
United are languishing 13th in the Premier League after suffering a 3-1 defeat to Brighton at Old Trafford and manager Ruben Amorim hinted at the need for reinforcements after the game when he admitted his side are perhaps the "worst team" in the club's history.
And Sheringham has named Alexander Isak, who has been heavily linked with rivals Arsenal, as one player he would like United to sign. "I wouldn't be surprised to see two big January signings at Manchester United," Sheringham told BoyleSports.
"I think United need to rebuild, but it's hard to get big names and proper players in the January window. I think it's a time to work in the background and look for players to start next season. I'd like to see big signings but it's going to be difficult.
"United just need an overall upgrade. They have good players but not top players. People were picking combined XIs with Liverpool last week with not a single United player in there. That is unheard of when you think about the last 30 years.
"When top players became available, United used to go out and break the bank to get them. That isn't the case at the moment. There is a massive rebuilding job to do." And Sheringham believes Isak would be a "perfect signing" for United, with only Mohamed Salah and Erling Haaland scoring more Premier League goals than the Newcastle star this season.
"Manchester United is still a massive draw for any player and playing for the club is still a highlight of anyone's career," Sheringham added. "Would Alexander Isak consider joining United if a bid came in? Without a doubt.
"I'm not saying a deal will get done but he would be the perfect signing for United. He can lead the line and score goals and could be a statement signing for the new regime. He is full of confidence at the moment and could lead by example."
United will need to let players go before they can afford to sign anyone this month, but the likes of Marcus Rashford, Antony and Tyrell Malacia have all been heavily linked with exits that will free up some funds.