Bayern Munich's chief financial officer Jan-Christian Dreesen has revealed the Bundesliga club once turned down a 100 million euro (£85m) offer for Thomas Muller from Manchester United.
The 27-year-old Germany forward, a World Cup winner in 2014, was the subject of a big-money approach from the Red Devils, but Bayern rejected the bid as they did not want to "weaken" Muller.
In an interview with Sport Bild on Tuesday, Dreesen said of the enquiry from Jose Mourinho's Premier League side: "There really was such a thing. A fax came from England.
"For us, however, selling Thomas Muller was never discussed.