Marc Marquez wins MotoGP at Valencia

Valencia: World champion Marc Marquez clinched his 12th MotoGP victory of the season in Sunday's final race in Valencia ahead of French rookie Fabio Quartararo.

Marquez, who secured his sixth premier category title last month, finished over a second clear of pole-sitter Quartararo who came second for the fifth time in his debut campaign.

The Spaniard made a poor start from second place on the grid but steadily picked off his rivals one by one to win at Valencia for just the second time in his career.

"It's been a difficult weekend because we've tried new things," said Marquez. "It's a perfect season which will be difficult to repeat."

Triple MotoGP champion Jorge Lorenzo bid farewell to the sport with a 13th-place finish in his final race.

The 32-year-old Spaniard announced his decision to retire on Thursday.

He could be replaced by Marquez's younger brother and Moto 2 champion Alex at Honda next season.