The half-length victory delivered a one-two in the race for Saudi Arabia's Prince Khalid Abdullah. Byword, narrowly beaten by champion filly Goldikova on his last outing in Paris, started 5-2 favourite and the colt's trainer Andre Fabre confessed he was only worried about the relative inexperience of his young jockey.
Owner Prince Khalid was on the mark again in the last race of the day when Tom Queally booted home 5-1 chance Timepiece to give trainer Henry Cecil a phenomenal 72nd Royal Ascot success.
Earlier, Mark Johnston's 8-1 shot Rainfall handed champion Ryan Moore his first triumph at Royal Ascot 2010 with a hard fought victory over Red Jazz in the opening Jersey Stakes. Moore was back in the winner's enclosure later after holding on to land the Windsor Forest Stakes for fillies on Strawberrydaiquiri (9-2).