| HENDRY | Stephen ---, snooker player who became the youngest-ever World Champion in 1990 (6) |
| EMERSONFITTIPALDI | F1 driver who became the youngest ever world champion in 1972 |
| STEPHENHENDRY | Scotsman who became the youngest snooker world champion in 1990, aged 21 (7,6) |
| MAGUIRE | Stephen -, snooker player who won the 2013 Welsh Open (7) |
| LITTLER | Luke _, English darts player who became the youngest ever world champion (7) |
| BECKER | Boris _, tennis player who became the first German to win Wimbledon in 1985 (6) |
| FOWLER | Rickie, golfer who became the youngest ever U.S. Ryder Cup player in 2010 (6) |
| HARVEY | Liverpool and 2018-19 Fulham midfielder who in 2019 became the youngest ever Premier League player at 16 years and 30 days (6) |
| GARCIA | Which Spaniard became the youngest ever Ryder Cup player in 1999? (6) |
| MALALA | _ Yousafzai, Pakistani education activist who became the youngest-ever Nobel Prize recipient in 2014 (6) |
| GUKESHDOMMARAJU | Grandmaster who became the youngest-ever World Chess Champion in December 2024 |
| CASEY | South Korea's ... Phair, who recently became the youngest ever World Cup football player. (5) |
| HINGIS | Martina who became the youngest-ever Wimbledon doubles winner, at age 15 |
| KHOKHO | Which sport's first-ever World Cup was held in Delhi in January 2025? (3,3) |
| SELES | Monica ___, tennis player who became the youngest-ever French Open champion at the age of 16 in 1990 |
| CARLOSALCARAZ | 19-year-old Spanish tennis player who became the youngest ever men's year-end world No. 1 in November 2022 (6,7) |
| MARTINAHINGIS | Swiss tennis player who was the youngest ever Grand Slam champion and youngest ever world number one (7.6) |
| ARTETA | Mikel ___, former player who became head coach of Arsenal in December 2019 |
| LOMU | Former New Zealand rugby union player who became the youngest-ever All Black in 1994 (5,4) |
| JONAH | Former New Zealand rugby union player who became the youngest-ever All Black in 1994 (5,4) |
