<Table> <Tr> <Th_colspan="2"> Qatar Open </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th_colspan="2"> Tournament information </Th> </Tr> <Tr> <Th> Founded </Th> <Td> 1993 </Td> </Tr> <Tr> <Th> Location </Th> <Td> Doha Qatar </Td> </Tr> <Tr> <Th> Venue </Th> <Td> Khalifa International Tennis and Squash Complex </Td> </Tr> <Tr> <Th> </Th> <Td> ATP World Series (1993--97) ATP International Series (1998--2008) ATP World Tour 250 series (2009--current) </Td> </Tr> <Tr> <Th> Surface </Th> <Td> Outdoor / Hard </Td> </Tr> <Tr> <Th> Draw </Th> <Td> 32S / 32Q / 16D </Td> </Tr> <Tr> <Th> Prize money </Th> <Td> $1,237,190 </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.qatartennis.org </Td> </Tr> <Tr> <Th_colspan="2"> Current champions (2017) </Th> </Tr> <Tr> <Th> Men's singles </Th> <Td> Novak Djokovic </Td> </Tr> <Tr> <Th> Men's doubles </Th> <Td> Feliciano López Marc López </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Qatar Open </Th> </Tr>

Who has won the 2017 qatar open men's single tennis tournament
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