Chelsea are one of the clubs that have been offered the chance to sign Philippe Coutinho from Barcelona.
He is currently on loan at Bayern Munich until the end of the season, but the Bundesliga club are unlikely to take up their option to sign him permanently.
Coutinho moved to Barcelona from Liverpool for £145m three years ago.
He came on as a second-half substitute when Bayern won 3-0 win at Chelsea two months ago and while he was in London he told his agent he would be interested in returning to the Premier League.
Chelsea will strengthen their squad in the next transfer window, and have already signed Hakim Ziyech from Ajax but have Pedro, Willian and Olivier Giroud out of contract this summer.