<P> Williams driver Felipe Massa retired from Formula One at the end of the 2017 championship . Massa was replaced by former Renault test driver and SMP Racing driver Sergey Sirotkin, who made his competitive début with the team . </P> <P> The following twenty - one Grands Prix are due to be run as part of the 2018 World Championship: </P> <Table> <Tr> <Th> Round </Th> <Th> Grand Prix </Th> <Th> Circuit </Th> <Th> Date </Th> </Tr> <Tr> <Th> </Th> <Td> Australian Grand Prix </Td> <Td> Melbourne Grand Prix Circuit, Melbourne </Td> <Td> 25 March </Td> </Tr> <Tr> <Th> </Th> <Td> Bahrain Grand Prix </Td> <Td> Bahrain International Circuit, Sakhir </Td> <Td> 8 April </Td> </Tr> <Tr> <Th> </Th> <Td> Chinese Grand Prix </Td> <Td> Shanghai International Circuit, Shanghai </Td> <Td> 15 April </Td> </Tr> <Tr> <Th> </Th> <Td> Azerbaijan Grand Prix </Td> <Td> Baku City Circuit, Baku </Td> <Td> 29 April </Td> </Tr> <Tr> <Th> 5 </Th> <Td> Spanish Grand Prix </Td> <Td> Circuit de Barcelona - Catalunya, Montmeló </Td> <Td> 13 May </Td> </Tr> <Tr> <Th> 6 </Th> <Td> Monaco Grand Prix </Td> <Td> Circuit de Monaco, Monte Carlo </Td> <Td> 27 May </Td> </Tr> <Tr> <Th> 7 </Th> <Td> Canadian Grand Prix </Td> <Td> Circuit Gilles Villeneuve, Montreal </Td> <Td> 10 June </Td> </Tr> <Tr> <Th> 8 </Th> <Td> French Grand Prix </Td> <Td> Circuit Paul Ricard, Le Castellet </Td> <Td> 24 June </Td> </Tr> <Tr> <Th> 9 </Th> <Td> Austrian Grand Prix </Td> <Td> Red Bull Ring, Spielberg </Td> <Td> 1 July </Td> </Tr> <Tr> <Th> 10 </Th> <Td> British Grand Prix </Td> <Td> Silverstone Circuit, Silverstone </Td> <Td> 8 July </Td> </Tr> <Tr> <Th> 11 </Th> <Td> German Grand Prix </Td> <Td> Hockenheimring, Hockenheim </Td> <Td> 22 July </Td> </Tr> <Tr> <Th> 12 </Th> <Td> Hungarian Grand Prix </Td> <Td> Hungaroring, Mogyoród </Td> <Td> 29 July </Td> </Tr> <Tr> <Th> 13 </Th> <Td> Belgian Grand Prix </Td> <Td> Circuit de Spa - Francorchamps, Stavelot </Td> <Td> 26 August </Td> </Tr> <Tr> <Th> 14 </Th> <Td> Italian Grand Prix </Td> <Td> Autodromo Nazionale Monza, Monza </Td> <Td> 2 September </Td> </Tr> <Tr> <Th> 15 </Th> <Td> Singapore Grand Prix </Td> <Td> Marina Bay Street Circuit, Singapore </Td> <Td> 16 September </Td> </Tr> <Tr> <Th> 16 </Th> <Td> Russian Grand Prix </Td> <Td> Sochi Autodrom, Sochi </Td> <Td> 30 September </Td> </Tr> <Tr> <Th> 17 </Th> <Td> Japanese Grand Prix </Td> <Td> Suzuka International Racing Course, Suzuka </Td> <Td> 7 October </Td> </Tr> <Tr> <Th> 18 </Th> <Td> United States Grand Prix </Td> <Td> Circuit of the Americas, Austin, Texas </Td> <Td> 21 October </Td> </Tr> <Tr> <Th> 19 </Th> <Td> Mexican Grand Prix </Td> <Td> Autódromo Hermanos Rodríguez, Mexico City </Td> <Td> 28 October </Td> </Tr> <Tr> <Th> 20 </Th> <Td> Brazilian Grand Prix </Td> <Td> Autódromo José Carlos Pace, São Paulo </Td> <Td> 11 November </Td> </Tr> <Tr> <Th> 21 </Th> <Td> Abu Dhabi Grand Prix </Td> <Td> Yas Marina Circuit, Abu Dhabi </Td> <Td> 25 November </Td> </Tr> <Tr> <Td_colspan="4"> Source: </Td> </Tr> </Table> <Tr> <Th> Round </Th> <Th> Grand Prix </Th> <Th> Circuit </Th> <Th> Date </Th> </Tr>

When does the 2018 formula one season start