2015 MotoGP World Championship

The season had 18 races, beginning in Qatar and finishing in Valencia, which determined who would be world champion between Movistar Yamaha teammates Lorenzo and runner-up Valentino Rossi.

This season is well known for the Sepang clash, which involved a collision between two-time defending champion Marc Márquez and then-championship leader, Rossi.

[11] The Australian Grand Prix was won by Márquez, with Lorenzo second, Ducati's Andrea Iannone finishing third and Rossi fourth, in a race considered to be one of the greatest in MotoGP's history.

[13] Despite the incredible response from fans, Rossi was uphappy with how the race unfolded and, in the following pre-event press conference at Malaysia one week later, accused Marquez of helping Lorenzo in his title aspirations (a claim which Márquez refuted).

[14][15] The Malaysian race was originally at risk of cancellation due to smoke from fires in Indonesia impacting the track, but ultimately went ahead.

[16] However, the incident divided fans, pundits and the riders on the grid, and Lorenzo was booed from the podium after giving Rossi a thumbs down gesture.

[20] Márquez defended his riding style in Malaysia, stating his disappointment towards both his rival's actions on the track and subsequent comments made to race direction.

[15] The fallout from the Malaysian race included a clash between the Márquez family and Italian television reporters who invaded the family property in Barcelona, wrongful accusations of Lorenzo storming race direction to demand a penalty for Rossi, and hostile reactions by some fans in response to Rossi's appeal of the penalty being unsuccessful.

FIM president Vito Ippolito deemed the events as having a "damaging effect on the staging of our competitions" and "[poisoning] the atmosphere around the sport".

Ippolito and Dorna Sports boss Carmelo Ezpeleta called for a private meeting of all riders and crew chiefs in Valencia and cancelled the pre-event press conference.

Bold – Pole Italics – Fastest LapLight blue – Rookie Each constructor received the same number of points as their best placed rider in each race.

Jorge Lorenzo (pictured in 2013) won his third MotoGP world title, and fifth world title overall, by winning the final race of the season in Valencia .