Master Dino stamped his class over the Grade One Prix Renaud du Vivier – Grande Course de Haies des 4 Ans (Hurdle) at Auteuil.
Nine went to post for this important four year-old hurdle, over two miles, 3 ½ furlongs.
The two greys Marlonne and Raffles Sun, took the field along through the early stages, with the latter soon taking up a commanding lead.
The unbeaten Boy Royal, moved up from the back of the field to join Raffles Sun, as the field headed down the back, where the field spread across the track.
At the first in the back, Mysterious Boy and Tap Tap Boom crashed out.
Three out, Raffles Sun led on the inside, with Tunis in the centre and Boy Royal out wide.
As they turned for home, Master Dino eased to the lead with Raffles Sun in the centre and Tunis on the inside.
Master Dino pressed on with the stands rail to help and took the last well clear, piling it on for a wide-margin victory under James Reveley. Back in fourth, the Paul Nicholls trained Malaya, took a crashing fall at the final flight, but was reported to be OK afterwards.
Tunis took second, with Raffles Sun in third.
The impressive Master Dino was another big winner for Guillaume Macaire and was winning for the fourth successive time, to stamp himself the leading hurdler in France.