[3] He entered the ownership of Sir Robert Ogden, best known as an owner of National Hunt horses including See More Business, Voy Por Ustedes and Exotic Dancer.
[8] On his three-year-old debut Sans Frontieres was ridden by Johnny Murtagh in the Craven Stakes (a trial race for the 2000 Guineas) over one mile at Newmarket Racecourse on 16 April in which he at odds of 12/1 and finished second of the seven runners behind the odds-on favourite Delegator.
After racing towards the rear of the field he stayed on strongly in the straight to take third place beat three quarters of a length and a head by the Aidan O'Brien-trained colts Black Bear Island and Freemantle.
After a break of eleven months, Sans Frontieres returned in the Group 3 Earl of Sefton Stakes over nine furlongs at Newmarket in April in which he was partnered by Frankie Dettori and finished sixth of the eight-runner behind Sri Putra.
At Royal Ascot on 19 June the colt was ridden by Tom Queally when he was stepped up in distance and started a 25/1 outsider for the Hardwicke Stakes over one and a half miles.
Nineteen days after his run at Ascot Sans Frontieres, with Queally again in the saddle, started at odds of 14/1 in an eight-runner field for the Princess of Wales's Stakes on good to firm ground at Newmarket.
Spanish Moon started favourite while the other runners included Crowded House, Holberg (winner of the Queen's Vase), Tazeez (Earl of Sefton Stakes) and Man of Iron.
[11] In the Group 2 Geoffrey Freer Stakes on softer ground at Newbury Racecourse Sans Frontieres was ridden by Murtagh and started the 3/1 second choice in the betting behind the Godolphin representative Kite Wood, the winner of the race in 2009.
Ridden by Olivier Peslier he was made the 13/8 favourite against seven runners headed by the six-year-old mare Profound Beauty whose wins included the Curragh Cup and two editions of the Ballyroan Stakes.
Profound Beauty went to the front a furlong and a half out but was soon joined by Sans Frontieres who gained the advantage before drawing ahead to win "comfortably" by three quarters of a length.