Rafael Nadal and Roger Federer were placed in the same half of the draw for the French Open on Thursday meaning the two longtime rivals could meet in the semi-finals.

Second seed Nadal is chasing a 12th title in Paris while 2009 champion Federer, seeded three, is playing in the tournament for the first time since 2015.

Nadal starts against qualifiers in the first two rounds while 37-year-old Federer, bidding to become the oldest Grand Slam title winner of all time, faces Italy's Lorenzo Sonego, ranked at 73.

Top seed and world number one Novak Djokovic starts his campaign against Poland's Hubert Hurkacz, the world number 43.

Djokovic, the 2016 champion, is bidding to become only the second man in history to hold all four Slams at the same time.

Only Rod Laver, who swept to calendar Slams in 1962 and 1969, has previously achieved the feat.

If the seedings work out for the quarter-finals, then 15-time major winner Djokovic would face Germany's Alexander Zverev who has still to get past the last eight at a Slam.

Fourth seed Dominic Thiem, the 2018 runner-up to Nadal, would face Argentine eighth seed Juan Martin del Potro while Federer would meet Stefanos Tsitsipas, the Greek who stunned him at the Australian Open in January.

Nadal, who won his first title of 2019 in Rome last weekend against a weary Djokovic, is seeded to face Japan's Kei Nishikori in the last-eight.

In the women's draw, top seed Naomi Osaka, bidding for a third successive Grand Slam title, opens against world 92 Anna Karolina Schmiedlova of Slovakia.

Three-time champion Serena Williams, chasing a record-equalling 24th major, begins against Vitalia Diatchenko of Russia.

She could face Osaka in the quarter-finals in a rematch of their stormy 2018 US Open final where the Japanese star triumphed while the American suffered a spectacular meltdown.

Defending champion Simona Halep, seeded three, plays Australia's Ajla Tomljanovic in her first round match.

Venus Williams, unseeded this year, begins against ninth seed Elina Svitolina of the Ukraine.

Second seed Karolina Pliskova, the champion in Rome last weekend, starts against Madison Brengle of the United States.