Chloe Aston proves her rich potential at the Horse of the Year Show with another podium The 17 year-old, from Tring in Hertfordshire, was runner-up aboard Chateau de Brion Quainton in ­Thursday's Xerox Special Event ­Services Cup at Birmingham's LG Arena. And she followed it up with another impressive second place in yesterday's opening international class, the Dick Turpin Stakes, this time riding Amigo T. Aston pushed Ireland's Dermott Lennon all the way, clocking 54.59sec in the one-round speed class. But the experienced Lennon prevailed, guiding Lougview Lou-Lou home in a time of 54.06 sec, with his fellow Irishman, Shane Breen, third on Ominerale Courcelle. "This is a dream come true," Dimmock said. It was a tough track, but Capello II was absolutely amazing today. The horse thrives under pressure, and he pulled it out of the bag. It all went to plan. This is the best win of my career so far. Meanwhile, seven Olympic champions and nine of the world's 10 top-ranked riders are in Rio de Janeiro for Latin America's most important equestrian event. The sixth edition of the Athina Onassis Horse Show drew stars including Switzerland's Steve Guerdat, who won the gold at this summer's Olympics in London, as well as Britain's Nick Skelton, who took the Olympic gold in the team competition. Laura Kraut, of the United States, who won gold in Beijing, in 2008, is also competing. The Oi Grand Prix, in which riders take on 4ft high jumps, carries an £800,000 prize, making it the best-remunerated equestrian event worldwide, according to the organisers.