Fulham are one of a number of clubs linked with a move for the Brazilian-born centre-back, including Newcastle United.
Munsterman has said that he is determined to keep the 24-year-old in Holland this season.
He said: "It's absolutely not true about Fulham, we didn't receive a bid at all.
"The media are writing that we want to sell Douglas because he's out of contract in a year, but that's not true.
"To us it's not about losing a player on a free agent, but what the result is after we've paid agents and such."