Shortly after, he was poised to join PSV Eindhoven as a replacement for Ruud Gullit, but a move stalled and did not take place.
Less impressive in scoring the season after, Rahn's form decreased massively then and ended in pittance-like transfers to 1.
FC Köln, Hertha BSC, Fortuna Düsseldorf, Eintracht Frankfurt and finally Urawa Red Diamonds of Japan, the club where he finished his career.
[2] In those games he scored five goals, the most important of them seconds after coming on as a second-half substitute for Felix Magath on his debut against Sweden in a World Cup qualifier on 17 October 1984.
Hampered by injury, he was part of the 1986 FIFA World Cup squad of his nation but did not come to action in the tournament.