Trainer Gordon Ellioitt was left 'absolutely heartbroken' following the death of three-time Cheltenham winner Sire Du Berlais from a fatal injury.
The 12-year-old pulled up three hurdles from the end of the Ladbrokes Champion Stayers Hurdle at Punchestown on Thursday.
Among his three Cheltenham victories was the 2023 Paddy Power Stayers Hurdle.
Sire Du Berlais also twice claimed Aintree's top flight Liverpool Hurdle.
An emotional Elliott paid tribute to the JP McManus-owned horse following the race.
Sire Du Berlais suffered a fatal injury during the Champion Stayers Hurdle on Thursday
Trainer Gordon Elliott left 'absolutely heartbroken' following death of 'horse of a lifetime'
He told RacingTV: 'It's absolutely heartbreaking.