The Grand Slam of Eventing, sponsored by Rolex, consists of three of the top CCI5*-L (previously CCI4*, due to a rating change effective January 1, 2019.
Pippa Funnell in 2003 and Michael Jung in 2016, are the only riders to have achieved the Grand Slam since its inception in 1999.
This is especially important, since the Badminton Horse Trials is only one week after Kentucky, and the horse would not have sufficient time to recover between the two competitions, especially since they would have to be flown overseas in that time.
The Grand Slam of Eventing began in 1999, and has since only been won by two riders.
Pippa Funnell (GBR): Michael Jung (GER): Andrew Hoy (AUS): Oliver Townend (GBR): William Fox-Pitt (GBR): Andrew Nicholson (NZL): Pre 1999: Having picked up the Grand Slam concept, which was originally launched by the three events acting in concert, the company have since established themselves as a leading sponsor within Three Day Eventing.