<Tr> <Td> 2015 </Td> <Td> USA </Td> <Td> Williams, Serena Serena Williams </Td> <Td> CZE </Td> <Td> Šafářová, Lucie Lucie Šafářová </Td> <Td> 6--3, 6--7, 6--2 </Td> </Tr> <Tr> <Td> 2016 </Td> <Td> ESP </Td> <Td> Muguruza, Garbiñe Garbiñe Muguruza </Td> <Td> USA </Td> <Td> Williams, Serena Serena Williams </Td> <Td> 7--5, 6--4 </Td> </Tr> <Tr> <Td> 2017 </Td> <Td> LAT </Td> <Td> Ostapenko, Jeļena Jeļena Ostapenko </Td> <Td> ROU </Td> <Td> Halep, Simona Simona Halep </Td> <Td> 4--6, 6--4, 6--3 </Td> </Tr> <Table> <Tr> <Td> Competitions prior to 1925 opened only to French tennis club members and French nationals </Td> </Tr> </Table>

Who won the french open women's tennis