<Tr> <Td> Loss </Td> <Td> 2009 </Td> <Td> US Open </Td> <Td> Hard </Td> <Td> Juan Martín del Potro </Td> <Td> 6--3, 6--7, 6--4, 6--7, 2--6 </Td> </Tr> <Tr> <Td> Win </Td> <Td> </Td> <Td> Australian Open (4) </Td> <Td> Hard </Td> <Td> Andy Murray </Td> <Td> 6--3, 6--4, 7--6 </Td> </Tr> <Tr> <Td> Loss </Td> <Td> 2011 </Td> <Td> French Open </Td> <Td> Clay </Td> <Td> Rafael Nadal </Td> <Td> 5--7, 6--7, 7--5, 1--6 </Td> </Tr> <Tr> <Td> Win </Td> <Td> 2012 </Td> <Td> Wimbledon (7) </Td> <Td> Grass </Td> <Td> Andy Murray </Td> <Td> 4--6, 7--5, 6--3, 6--4 </Td> </Tr>

Who has the best record against roger federer
find me the text answering this question