United could close the gap on Liverpool but will have to do so with a depleted side.
De Gea has long been linked with a move back to the Spanish capital.
Lukaku, 23, has refused to sign a contract extension at Goodison Park.
Chelsea are also reportedly interested in the Brazil international but won't pay his release clause.
Lingard remains in talks over a new contract while Martial hails the club's fans.
Rooney has long been linked with a return to Everton.
Perez rules out offloading Karim Benzema in the summer.
Griezmann, 26, has more than four years left on his Atletico contract.
Mesut Ozil, Toby Alderweireld and Willian have all been linked with a move to Manchester United.
Lindelof committed his future to Benfica by signing a new contract in March.
The 31-year-old is reportedly willing to take a pay cut to continue playing in the Premier League.
Jose Mourinho is looking to sign players with Premier League experience.
Griezmann, 25, says he has no plans to quit Atletico in the near future.
Wayne Rooney is "doubtful" to remain at Old Trafford according to ex-United skipper.
Toure's contract at Manchester City expires at the end of the season.
Ibrahimovic, 35, says he is yet to make a decision on his future.
Welbeck was allowed to join Premier League rivals Arsenal.
Dembele, 20, has scored 17 goals in 26 league appearances for Celtic this season.
Ibrahimovic, 35, has scored 15 league goals for Manchester United this season.
Poland international not interested in being alternative to Antoine Griezmann this summer.
Ibrahimovic, 35, has scored 15 Premier League goals for United this season.
Pogba came in for criticism after United drew with Bournemouth.