Imperial Monarch made all of the running under Joseph O'Brien to win the Group One Juddmonte Grand Prix de Paris at Longchamp.

The Ballydoyle colt had endured a nightmare passage at Chantilly in the French Derby last time so his jockey had him in the best possible position from the start.

He was strongly challenged in the closing stages by Last Train but the winner gamely stuck to his guns to take the prize in a photograph.

Saint Baudolino was third while Epsom Derby runner-up Main Sequence had his path blocked up the inner on a number of occasions and had to settle for an unfortunate fourth under Ted Durcan.