Lewis Hamilton celebrates at the Mexican Grand Prix after winning a fourth F1 drivers' title.
Hamilton clinched his third world title at the 2015 United States Grand Prix at Austin.
The previous year, he won his second drivers' championship, beating Mercedes teammate Nico Rosberg at the final race of the season in Abu Dhabi.
The Briton's first triumph came in only his second season in the sport. Hamilton is seen here celebrating with his father, Anthony (left) and brother Nick after winning the 2008 world drivers' title with McLaren.
Hamilton has finished runner-up on two occasions. In 2007, his rookie season, he was pipped to the title by a single point in the final race by Kimi Raikkonen (right).
In 2016, Hamilton had to settle for second after Nico Rosberg took the title before announcing his retirement from F1.
Hamilton and Sebastian Vettel embrace at the 2017 Chinese Grand Prix. Th