Valentino Rossi, left, will rejoin Jorge Lorenzo at Yamaha next season, renewing one of MotoGP's biggest rivalries in recent years.
Ducati doledrums —
Seven-time world champion Rossi has struggled since joining Ducati in 2011, having taken with him his No. 46 -- the number with which his bike has always been adorned to commemorate the first win by his father, who was also a motorbike racer.
'The Doctor' departs —
Rossi left Yamaha in 2010, having won 46 races for the Japanese team. However, that year the man known as "The Doctor" lost his world title to younger teammate Lorenzo.
Rise of 'the outsider' —
Rossi won the world championship in Lorenzo's first two years with the team, but the Spaniard usurped him after finishing fourth in 2008 and second in 2009.
New teammates —
Rossi welcomed Lorenzo to Yamaha in 2008. The 25-year-old is known as "Por Fuera" (meaning "by the outside") following a daring move in his first race victory in the 125cc class in 2003.