Yuvraj first came to attention when he captained the U-19 Punjab cricket team in the final of the Cooch-Behar Trophy against Bihar U-19s, in which he scored 358. He then gained selection for the U-19 World Cup in Sri Lanka in January 2000, where he was part of a team lead by Mohammed Kaif which won the tournament. Yuvraj was subsequently selected in 2000 for the first intake of the National Cricket Academy in Bangalore.
Yuvraj made his One Day International debut against Kenya at Nairobi in 2000, at the ICC KnockOut Trophy. He showed his potential in his second ODI which was against the Australians where he scored a quickfire 84 off 82 balls against a quality pace attack consisting of bowlers like Glenn McGrath, Brett Lee and Jason Gillespie. However, after a lean run of form, he was dropped for the one-dayers against Australia in India in early 2001, but returned later in the year and helped India to victory in a match in Sri Lanka with an unbeaten 98.