The winger is on loan from RB Leipzig since January, while Spurs have an option to buy him within the agreement.
However, they must trigger the clause within a few weeks, otherwise Werner will be on the open market.
Advertisement
Advertisement
"I think from our perspective there's a deadline there," he told football.london after his team's post-season friendly against Newcastle.
"Again a lot of that will depend on the negotiations between the clubs and how Timo feels.
"Again, from my perspective, I'm comfortable with that situation and I'll let the other guys steer it to see what kind of outcome there is."