Champion hurdler Hurricane Fly set a world record for Grade One victories by winning Sunday's Morgiana Hurdle at Punchestown.
It was a 17th success at the top level for the Willie Mullins-trained horse, who was ridden by Ruby Walsh.
The victory sees him outdo Paul Nicholls's chasing hero Kauto Star and American flat horse John Henry.
The 1-16 favourite had to hold off his fast-finishing stable-mate Marito (14-1) for his 21st win from 32 starts.
The nine-year-old Montjeu gelding is about 6-1, behind young challengers The New One (4-1) and Our Conor (5-1).
Walsh, who won on all five of his rides at Punchestown on Sunday, was quick to pay tribute to Mullins.
He said: "To win 17 is incredible. To keep a horse that fit and that healthy, and to keep running at that level for so long, is an achievement in its own.
"It's a privilege to be able to ride him, but the work everyone puts into it at home is incredible."
Hurricane Fly was among seven winners at two fixtures on the day for Mullins, who had four successes at Punchestown, and three at Cork, where his second jockey Paul Townend enjoyed four victories.