The comments come just days after his club marched into the Champions League semi-finals with a last-gasp win over Qatar-owned Malaga. Another Qatar-backed club, Paris St Germain, narrowly lost out on a last-four spot to Barcelona.
"This [big cash injections] is neither sportsmanlike nor fair and our core business is still sport," Watzke told the Handelsblatt newspaper on Friday. "We do not need to come with respect and fair play if this is not reflected on all levels."
France's PSG have spent more than 200 million euros in transfers since the Qatari fund QSI bought the club in June 2011.
"I have the feeling that some sheikhs looked at the flight schedules and then picked a pretty metropolis because that is where the connections to the Gulf region are the best. But that is not how it works," he said.
"There needs to develop a brand, a trigger force. That is something the gentlemen from the Arab region need to learn," Watzke added.
