Winning junior worlds and then going on to win both senior worlds and the Olympic title is extremely difficult, and the statistics certainly bear this out, as only 12 individuals/couples have achieved the hat-trick in the 4 disciplines. The transition between juniors and seniors is one of the most difficult obstacles to overcome, and a significant proportion of skaters fail to come through it in competitive terms, with many losing the jumping ability that earned them junior success. Growth spurts and body changes can be harsh, cruel, and something of a lottery. Often, if the skater is part of a pair in pairs or ice dance, the transition necessitates a change of partner. Nevertheless, if a skater can come through that phase, even then success in seniors is still not assured. Much success at junior level is built upon technical ability, but at senior level, technical ability will only take you so far. Hence, many junior skaters entering seniors find that they need to build up their PCS scores, artistry, and maturity, in order to become competitive with the best senior skaters. This takes time and commitment to the cause. No wonder, therefore, that so few skater(s) have achieved the hat-trick. Here is the list of those that have achieved the hat-trick:- 1. Kristi Yamaguchi (Junior World Champion 1988 (singles & pairs), Senior World Champion 1991 & 1992, Olympic Champion 1992) 2. Kim Yu-Na (Junior World Champion 2006, Senior World Champion 2009, Olympic Champion 2010) 3. Viktor Petrenko (Junior World Champion 1984, Senior World Champion 1992, Olympic Champion 1992) 4. Alexei Yagudin (Junior World Champion 1996, Senior World Champion 1998, 1999, 2000, 2002, Olympic Champion 2002) 5. Evgeni Plushenko (Junior World Champion 1997, Senior World Champion 2001, 2003, 2004, Olympic Champion 2006) 6. Ekaterina Gordeeva & Sergei Grinkov (Junior World Champions 1985, Senior World Champions 1986, 1987, 1989, 1990, Olympic Champions 1988, 1994) 7. Anton Sikharulidze (Junior World Champion (with Maria Petrova) 1994, 1995, Senior World Champion (with Elena Berezhnaya) 1998, 1999, Olympic Champion (with Elena Berezhnaya) 2002) 8. Sergei Ponomarenko (Junior World Champion (with Tatiana Durasova) 1978, 1979, Senior World Champion (with Marina Klimova) 1989, 1990, 1992, Olympic Champion (with Marina Klimova) 1992) 9. Oksana Grishuk & Evgeni Platov (Junior World Champion (Evgeni Platov with Elena Krykanova) 1984, 1985, 1986, Junior World Champion (Oksana Grishuk with Alexandr Chichkov) 1988, Senior World Champions 1994, 1995, 1996, 1997, Olympic Champions 1994, 1998) 10. Marina Anissina (Junior World Champion (with Ilia Averbukh) 1990, 1992, Senior World Champion (with Gwendal Peizerat) 2000, Olympic Champion (with Gwendal Peizerat) 2002) 11. Roman Kostomarov (Junior World Champion (with Ekaterina Davydova) 1996, Senior World Champion (with Tatiana Navka) 2004, 2005, Olympic Champion (with Tatiana Navka) 2006) 12. Tessa Virtue & Scott Moir (Junior World Champions 2006, Senior World Champions 2010, 2012, Olympic Champions 2010) So who is the greatest skater(s) to achieve the hat-trick?