United has already announced the capture of defender Victor Lindelof.
It hasn't all been all plain sailing in Spain for Ronaldo.
The Frenchman faces the tricky task of trying to hold onto his players while signing big names.
Klopp is yet to win a trophy since moving to Anfield.
The player market officially opens on June 9 and record numbers are expected to be spent.
Mourinho has told the United CEO to get him four players this summer.
The Portuguese manager has taken United back to the Champions League.
Bale has suffered from injuries in the second half of the season.
Mourinho's star midfielder could join his old boss Ernesto Valverde, the new manager of Barcelona.
United has to reinforce ahead of a Champions League campaign.
"There are lots of poets in football but poets don't win many trophies."
The match will be played in Stockholm on Wednesday.
The Gunners finished a point behind Liverpool in the Premier League, just missing out on the elite European tournament.
The Portuguese is a prolific winner in cup finals and has won the Champions League twice.
The season's showpiece finals are still to be decided.
Ajax stand between United and a place in the Champions League next season.
James Rodriguez looks set to leave the Bernabeu this summer.
The Spaniard will finish his first season at the Etihad without a trophy, a first in his nine years of coaching.
United is keen on Monaco striker Kylian Mbappe.
Ronaldo almost single-handedly saw off Atletico Madrid.
The forward has starred in the Champions League this season.
The Arsenal goalkeeper spoke at length about the club's prospects as the season approaches its climax.
It looks increasingly likely to happen for the first time this century.
Dortmund defender Marc Bartra was injured in the bomb blasts.
The German side's chairman was unhappy with the performance of the match referee.