Widely considered the greatest challenge in equestrianism, the Rolex Grand Slam of Show Jumping rewards the outstanding rider who wins, consecutively, the Grand Prix at three of the four Majors, namely, The Dutch Masters in ’s-Hertogenbosch, the CSIO Spruce Meadows ‘Masters’ Tournament in Calgary, the CHIO Aachen and the CHI Geneva. To date, Rolex Testimonee Scott Brash from Scotland is the only competitor to achieve the feat, having done so across 2014 and 2015.