Football's transfer market re-opens on Sunday when Premiership clubs are officially allowed to sign new players.
Ronaldinho has been linked with Manchester United
The clubs have until 31 August to complete their deals, and will have to wait until January before they can boost their squads again.
Some Premiership moves have already been set in stone, such as Teddy Sheringham's release from Tottenham and Lee Bowyer's exit from relegated West Ham for Newcastle.
And a string of top players, such as Brazilian stars Ronaldinho and Rivaldo, Barcelona's Patrick Kluivert and Auxerre's Djibril Cisse, have been linked with English clubs.
Other possible deals, such as a rumoured swoop from Real Madrid or Barca for Manchester United's David Beckham, remain confined to the realms of speculation.
Fifa's new transfer window system allows Premiership clubs to sign contracted players only in January and from the beginning of June to the end of August.
The previous system in Britain allowed transfers during the season up to the third Thursday in March, with a freeze until the summer.
That system still exists for Nationwide League clubs - for whom the transfer window does not apply.