On 2 February 2002, Lonhro lined up as the odds-on favourite for the Royal Sovereign Stakes-Gr2 (1,200 m), beginning a run of 25 consecutive races that he started as favourite. He easily accounted for the small field before going on to win the Hobartville Stakes-Gr2 (1,400m) at his next start. He was installed as pre-post favourite for the Doncaster Handicap and a nominal favourite for many of the big races of the autumn, but it was announced soon after that Lonhro had contracted a virus and the resultant delay in his preparation saw the 3yo spelled until his four-year-old season.