Pippa Funnell admitted to being overcome with emotion after becoming the first rider to land equestrian's Grand Slam with victory at the Burghley Horse Trials on Sunday.
Funnell cleared all 11 fences in the showjumping
Funnell pipped the Queen's granddaughter Zara Phillips to scoop the £25,000 first prize and the £165,000 bonus on offer for also winning at Kentucky and Badminton this year.
Funnell, riding Primmore's Pride, was second going into the final discipline, the showjumping, but she put in a clear round while leader Phillips knocked down a fence.
"I am completely shattered," admitted the 34-year-old Funnell, after
scooping the world's richest eventing haul.
"I never want to go through that again. I owe everything to my horses."
Both of her top two horses, Supreme Rock and Cornerman, had setbacks while
training before Burghley.
"I was hugely relieved after going clear across country on Saturday, a weight
was off my shoulders," said Funnell.
"I owe a lot to my husband, William, who helped me with showjumping
technique, he was brilliant."
The Grand Slam has been untouched since it was offered five years ago to the winner of the world's three major four-star events - the Kentucky at
Lexington, Badminton and Burghley.
Funnell set up her jackpot at Lexington in April on Primmore's Pride, then
took Badminton on Supreme Rock.
Despite being pipped to first place, Phillips was delighted with her second place on her debut in a four-star event.
"I never expected to come this close," said the 22-year-old.
Phillips, whose mother Princess Anne won Burghley in 1971 and father Captain Mark Phillips won in 1973, is now hoping to contend for a place in the British team at next year's Olympics.
"I would love to ride at the Olympics, I hope I have a chance," she said.
Her mother competed in the Olympics in 1976 and her father won a gold medal in 1972.
The British team for Athens will be selected next May.