The 1975 Düsseldorf Grand Prix, also known by its sponsored name Agfa Colour Cup, was a men's Grand Prix tennis circuit tournament held at the Rochusclub in Düsseldorf, West Germany and played on outdoor clay courts. It was the sixth edition of the tournament and was held from 26 May though 1 June 1975. Second-seeded Jaime Fillol won the singles title.[1]
Jaime Fillol defeated Jan Kodeš 6–4, 1–6, 6–0, 7–5
François Jauffret / Jan Kodeš defeated Harald Elschenbroich / 
Hans Kary 6–2, 6–3