Juventus manager Massimiliano Allegri has said there is "no point" in talking about a replacement for Paul Pogba, adding that the France international would be back in training with the club on Monday.
Midfielder Pogba is reported to be on the verge of a record-breaking move from Juventus to United in a deal that will reach more than £100m when agents' fees are included.
On Saturday, the Manchester Evening News reported that United manager Jose Mourinho wants the 23-year-old to fly to England this weekend to wrap up his move, which it said the Premier League club had hoped to announce last Thursday.
But speaking at a news conference ahead of his side's friendly at West Ham United on Sunday, Allegri said: "Mourinho rightly says he's not talking about Pogba because he's a Juventus player.
"I've summoned Pogba together with [Patrice] Evra [to report for preseason duty] tomorrow night, so that means he has training here in Vinovo on Monday.
"It makes no sense at the moment talking about potential replacements for Pogba because, right now, Pogba is a Juventus player."
Paul Pogba has unfinished business to attend to at Manchester United.@AndyMitten: https://t.co/7cXNi6HDQz pic.twitter.com/RC58zBRxCs
- ESPN FC (@ESPNFC) 5 August 2016
On Wednesday, Mourinho said United were going to sign one more player "for sure" and hoped the player would be in place before the start of the Premier League campaign at Bournemouth on Aug. 14.
Speaking on Friday, he said: "I don't like to speak about other players. Other managers like to do that.
"What matters to me is only what happens in my house, not the house of my neighbour.
"Pogba is a Juventus player until officially he isn't. It stays like this."
But with one week to go before the start of the Premier League season, the manager again gave a timeline for the deal to possibly be completed.
"Honestly, the market closes on Aug. 31, but I think my club is trying to do everything to close our market before Aug. 14," he said. "So hopefully by next week we will have our squad closed."
Pogba's absence from the squad to face West Ham on Sunday means the seven midfielders available are Miralem Pjanic, Hernanes, Mario Lemina, Kwadwo Asamoah, Roberto Pereyra, Roman Macek and Grigoris Kastanos.