Cristian Demuro will partner Prix de l'Arc de Triomphe favourite Sea The Moon in his lead-up to the Longchamp showpiece in the Grosser Preis Von Baden.

Andreas Helfenbein partnered the three-year-old to victory on his first two competitive appearances, but Belgian Christophe Soumillon took over when Sea The Moon ran out a breathtaking winner of the German Derby.

With Soumillon unavailable on Sunday due to riding commitments in France, trainer Markus Klug has had to find a replacement and Demuro has been given the call-up.

"Cristian will ride on Sunday as Christophe Soumillon is required to ride for the Aga Khan in France," Klug said.

While he has been forced to make alternative riding plans for this weekend, Klug has not given up hope Soumillon could get back aboard Sea The Moon in the Arc.

"I hope he will be available in October," he said.