Matus Bero gave Bochum an early lead in the 16th minute, latching onto Philipp Hofmann’s incisive pass and slotting home past goalkeeper Gregor Kobel, who five minutes later was guilty of mis-handling a pass to attacker Dani de Wit to double the visitors’ advantage.

Dortmund looked increasingly desperate for a goal, but were denied by a series of fine saves from goalkeeper Patrick Drewes, until Guirassy headed home from the centre of the area just before the break from midfielder Julian Brandt’s cross.

The home side equalised in the second half through Emre Can’s penalty after Felix Passlack fouled Guirassy, who later scored his second in the 75th and Felix Nmecha completed the rout with a long-range strike nine minutes from time.