Great Britain’s Sir Chris Hoy and Jason Kenny both claimed victories on the opening evening of the Six Days of Rotterdam meeting.
The duo, who won two golds each at the London Olympic Games, took the team sprint, keirin and individual sprint titles collectively in Thursday night's action.
The pair opened the evening in the two-man team sprint event against Teun Mulder and world champion Gregory Bauge and proved too powerful en route to the win.
Olympic sprint champion Kenny, in his first competitive event since the UCI Glasgow Track World Cup, then took the individual sprint title, first qualifying fastest before overcoming fellow Olympic finalist Bauge in the semi-final.
Hoy, who had qualified second, was beaten by Mulder in the other semi-final, leaving the Scot to face Bauge in the 3rd-4th place race and Kenny to meet Mulder in the final.
As he had done at last year’s UCI London Track World Cup, six-time Olympic champion Hoy got the better of Frenchman Bauge before a photo finish was required to separate Kenny and Mulder, but it was the Briton who had edged the contest.
Not to be denied an individual title on the night, world and Olympic keirin champion Hoy demonstrated his expertise in the discipline to triumph with Kenny managing second place to ensure he has the overall lead at the end of day one in the Giant Sprint Masters competition.
Giant Sprint Masters overall standings after day one
1. Jason Kenny 5
2. Chris Hoy 7
3. Teun Mulder 11
4. Grégory Baugé 13