The Borussia Dortmund CEO jokes that coach Jurgen Klopp would have problems putting out a starting XI if every transfer rumour surrounding his players turned out to be true
The Germany international has 18 months left on his contract at Signal Iduna Park and has been linked with a move to Manchester United and Arsenal in the past, although the player's father recently claimed that Carlo Ancelotti's side are ready to make a move for his signature.
However, Watzke has urged fans not to believe such talk, insisting that the midfielder has made no suggestion of wanting to leave.
"If we believed everything in the Spanish media about players supposedly leaving us, we would have to worry about getting a team together," he told Bild.
"We do not know from Ilkay or his father [who is also his agent] that he wants to leave."
Gundogan has endured a frustrating season, missing all but one Bundesliga game with a back injury picked up on international duty in August.