The 20-year-old has enjoyed another impressive season for BVB, scoring 37 goals and registering 11 assists in 38 appearances in all competitions.
Haaland has a €75m (£65m) release clause in his current deal, but it cannot be activated until next summer, placing Dortmund in a strong position leading into the next market, and Watzke has a "clear expectation" that the young forward will not be on the move ahead of the 2021-22 campaign.
"I have the clear expectation that Erling Haaland will play for us next year," Watzke told Bild. "And I don't waste any thoughts on anything else."
"I think they know about the contract situation and our stance there as well. I am just totally relaxed. Nobody believed us with Jadon Sancho last summer until deadline day, and he's still with us today."
The Norwegian has scored 53 goals in 56 appearances for BVB since arriving from Red Bull Salzburg. body check tags ::