Australian Samuel Jeffree and Santoro begun their Burghley campaign on Thursday, stepping into the dressage arena on the first day of action at the prestigious British five-star event.
The FEI World Championship reserve combination received a mark of 38.7 and are placed 17th in the provisional rankings with day two of the dressage still to come on Friday.
Fellow Australian and FEI World Championship long-listed combination Ema Klugman and Chiraz, who are based in the US, will complete their test on Friday.
Swiss rider Nadja Minder leads the field with Toblerone on a score of 29.5, ahead of British combinations Gemma Stevens and Chilli Knight on 29.6, and Max Warburton with Deerpairc Revelry on 31.2.
Tim Price is the best of a large Kiwi contingent, scoring 32.1 with Global Quest to hold provisional fourth place.
