Sea The Moon puts his position as Prix de l'Arc de Triomphe favourite on the line when he goes to post for the Grosser Preis Von Baden at Baden-Baden racecourse on Sunday.
The Markus Klug-trained colt is unbeaten in four career starts and takes the next step to possible European dominance in a Group One race used by Danedream to perfect her challenge for the Arc in 2011. She also won the 2012 renewal before a last-minute quarantine issue forced her to miss her Paris defence.
Sea The Moon sprang to prominence when winning the German Derby by 11 lengths and the second horse, Lucky Lion, came out and beat Noble Mission at Munich next time out.
However, Klug has warned the big day for his runner will be at Longchamp on 5 October, and expects improvement after the weekend.
He said: "He (Sea The Moon) is in good form. He is not quite 100%, but we want him to be 100% in October, not now.
"I am happy with him, though, and we are hoping for the best."
Owner Niko Lafrentz has no intention of seeing the son of Sea The Stars sold.
He told www.GermanRacingReview.com: "He will not leave Europe as a racehorse or as a stallion. We want what is best for our horse and we want him to be happy. The only flying Sea The Moon will do is on the racecourse!
"There will be no partners involved in Sea The Moon during his racing career. We want to ensure that we decide what is best for Sea The Moon and this is the only way we can do it.
"We will decide on his stallion career at the end of next year. However, no more than 49% of him will be available for syndication. We want to have complete control of his future as we have his best interests at heart.
"He will stand in Europe and he will not be available to shuttle to Australia. He can cover southern hemisphere mares but they will need to come to him.
"He is not my horse, he is our family's horse and it is important to remember this. We want him to remain in Europe so everyone here can enjoy him."
Lucky Lion again looks most likely to be the main opposition to the Klug hotpot, with Sirius a live contender for Andreas Lowe on the back of his success in the Grosser Preis Von Berlin.