| ROCKYMARCIANO | Who was the only world heavyweight boxing champion to retire undefeated? (5,8) |
| MARCIANO | Who was the only world heavyweight boxing champion to retire undefeated? (8) |
| WALTER | Scotland's first world boxing champion to be appointed MBE (1966) |
| MCGOWAN | Scotland's first world boxing champion to be appointed MBE (1966) |
| CATHERINEPARR | Who was the only wife to outlive Henry VIII? (9,4) |
| STONYMARCIANO | Former world heavyweight champion, to Roget? |
| LARSEN | Pitcher who threw the only World Series perfect game |
| SLOVAKIA | Home of the only world capital to border two other countries |
| FISCHER | Grandmaster who was the only US-born player to become World Chess Champion, Bobby ... |
| IDA | Lupino who was the only woman to direct an episode of the 1959 The Twilight Zone series |
| ALFRAMSEY | The only World Cup-winning England football manager (3,6) |
| BERRA | He jumped into Larsen's arms after the only World Series perfect game |
| CHRISRYAN | British author who was the only member of the ill-fated SAS mission Bravo Two Zero to both survive and escape capture during the Gulf War |
| VALRENETWEEDIE | Who was the only Australian ballet dancer to audition successfully for the Ballets Russes companies |
| DON | *He pitched the only World Series perfect game |
| YOGIBERRA | Catcher of the only World Series perfect game |
| ROTBLAT | Sir Joseph ___, Nobel Peace Prize-winner who was the only physicist to leave the Manhattan Project on grounds of conscience |
| RODNEYGOULD | Oxfordshire rider who was the only Briton, other than Phil Read, to win a 250cc world title for Yamaha. (6,5) |
| SOLANKI | Who was the only player to make two 50+ scores in the Zimbabwe vs India T20I series? (7) |
| FLOYDPATTERSON | The first world heavyweight champion to regain the title after losing it (5,9) |
