The clock is ticking for Manchester United to complete a deal for longtime transfer target Jadon Sancho.

Borussia Dortmund have set a deadline of Aug. 10 for a deal to be finalized. They won't listen to offers beyond that to avoid interrupting their preparations for the 2020-21 Bundesliga season, according to BBC Sport's Simon Stone.

A successful bid for the 20-year-old winger is expected to be worth as much as £100 million.

Although United have yet to submit a formal offer, the Premier League club would reportedly pay the fee in installments, Stone adds.