England international was one of United main targets but Spurs reportedly refused a £50m bid.
Clause dictating France international could only be sold for €200m expired at the end of the transfer window.
Pereira, who spent the last season on loan at Granada, has joined Valencia on loan.
Inter were linked with a move for Mustafi in the closing stages of the transfer window.
Willian had confirmed an approach from the Red Devils earlier in the summer.
Andreas Pereira and Scott McTominay could also seal temporary moves away from Old Trafford.
The 21-year-old is said to have flown to the Netherlands in order to complete a season-long switch.
Marca says that the midfielder is growing frustrated with the delays in negotiations between the clubs.
Bale, 28, was jeered by some sections of Madrid supporters in the club's 2-2 draw with Valencia.
Sanchez has one year left on his contract at Arsenal and has refused to sign a new deal.
Aurier is still awaiting the outcome of an appeal to determine whether he can enter the UK.
Pereira spent last season on loan with Granada in La Liga.
United re-signed Ibrahimovic after his contract expired earlier in the summer.
Ibrahimovic
Ibrahimovic re-joined Jose Mourinho's United on a one-year deal.
Ibrahimovic, 35, has been re-signed by the Red Devils on a one-year contract.
Super Deportivo says that La Liga side now need to agree terms with Manchester United to complete the deal.
Former Spurs stalwart Darren Anderton believes chairman Daniel Levy ensured such a transfer never happened.
Super Deporte suggests that Ezequiel Garay could be the reason behind the Red Devil's mission.
Dutch Under-21 international signed for Crystal Palace on a season-long deal earlier this month.
Despite Barca's recent troubles, Roberto is happy with life under Ernesto Valverde.
Valencia owner Peter Lim has reportedly travelled to England to complete the deal.