Britain's Scott Brash is targeting a showjumping treble worth 1m euros (£720,000) in the Rolex Grand Slam.
Brash, 29, rode Hello Sanctos to victory in Germany on Sunday to add to his previous win in Geneva in December.
The world number one is the first rider to ever win two of the three legs of the competition and will attempt the treble in Calgary in September.
"It will be amazing to be able to do it, although it will be very difficult," said the Scotsman.
Brash pocketed 330,000 euros (£236,000) in prize money for winning Sunday's class in Aachen after a seven-rider jump-off.
He will be guaranteed a 500,000 euros (£350,000) bonus just by competing in Canada later this year and will take home the 1m euro jackpot if he secures the grand slam.
Speaking after Sunday's victory, Brash said: "I don't think it has quite sunk in yet, it has been my dream to win Aachen, I am ecstatic.
"What makes Aachen so special is the crowd, to jump in front of 45,000 people that are also very knowledgeable, is great for us riders and brings out the best in us."