Gael Monfils. It is 11 years since Monfils reached the semi-finals in Paris. No 5 seed Alexander Zverev will be a tough test but the Frenchman is playing well enough to cause an upset. AFP
Alexander Zverev. Started slowly but has got better as the tournament has gone on. Fabio Fognini stands in his way of him matching his best performance at a grand slam if he wins today. AP Photo
Simona Halep. The Romanian put in her best performance yet in the third round in beating Lseia Tsurenko and she will want another comfortable win over Polish teen Iga Swiatek today to allow her weary body more rest. AFP
Karen Khachanov. Had a storming end to 2018 but the Russian has had an underwhelming 2019 until now. The No 10 seed will fancy his chances of ending the hopes of No 8 seed Juan Martin del Potro. AFP
Ashleigh Barty. This has been a breakthrough year for the Australian. She won the Miami Masters and now if she beats Sofia Kenin today she reaches her second successive grand slam quarter-final. Getty
Novak Djokovic. The World No 1 is still on course to repeat his 2015-16 feat of holding all four majors at the same time. He bids for a 25th successive win at a grand slam against Jan-Lennard Struff and it will be a huge shock if he doesn't do it. AFP
Gael Monfils. It is 11 years since Monfils reached the semi-finals in Paris. No 5 seed Alexander Zverev will be a tough test but the Frenchman is playing well enough to cause an upset. AFP
Alexander Zverev. Started slowly but has got better as the tournament has gone on. Fabio Fognini stands in his way of him matching his best performance at a grand slam if he wins today. AP Photo
Simona Halep. The Romanian put in her best performance yet in the third round in beating Lseia Tsurenko and she will want another comfortable win over Polish teen Iga Swiatek today to allow her weary body more rest. AFP
Karen Khachanov. Had a storming end to 2018 but the Russian has had an underwhelming 2019 until now. The No 10 seed will fancy his chances of ending the hopes of No 8 seed Juan Martin del Potro. AFP
Ashleigh Barty. This has been a breakthrough year for the Australian. She won the Miami Masters and now if she beats Sofia Kenin today she reaches her second successive grand slam quarter-final. Getty
Novak Djokovic. The World No 1 is still on course to repeat his 2015-16 feat of holding all four majors at the same time. He bids for a 25th successive win at a grand slam against Jan-Lennard Struff and it will be a huge shock if he doesn't do it. AFP
Gael Monfils. It is 11 years since Monfils reached the semi-finals in Paris. No 5 seed Alexander Zverev will be a tough test but the Frenchman is playing well enough to cause an upset. AFP
