Which sports person retired one week after becoming world champion in 2016?

Nico Erik Rosberg (born 27 June 1985) is a German-Finnish former racing driver who won the 2016 Formula One World Championship for the Mercedes team. The only child of Keke Rosberg (the 1982 Formula One World Champion) and his German wife Sina Rosberg, he was raised primarily in the principality of Monaco. Rosberg began competitive go-kart racing at the age of six and began aiming for a career in Formula One four years later.

The 2016 Abu Dhabi Grand Prix was a Formula One motor race held on 27 November 2016 at the Yas Marina Circuit in Abu Dhabi, United Arab Emirates. The race was the final round of the 2016 FIA Formula One World Championship and determined the 2016 World Drivers' Championship.

Nico Rosberg entered the round with a twelve-point lead over his teammate Lewis Hamilton in the World Drivers' Championship. Rosberg required a podium finish to secure the championship; Hamilton required a podium to remain in mathematical contention. Hamilton started the race from pole and went on to win the race, while Rosberg finished second, securing his maiden World Drivers' Championship title. Sebastian Vettel completed the podium in third.

A week after the Grand Prix, Rosberg announced his retirement from Formula One, making this Grand Prix his last. This was also the last Grand Prix for the Manor team, as the team folded before the start of the 2017 season.