PARIS (AFP) - Nine-time French Open champion Rafael Nadal and world No. 1 Novak Djokovic were placed on a quarter-final collision course in Friday's draw.

Nadal is seeded a lowly sixth this year after slipping to seven in the rankings and as a result was always likely to face one of his major rivals in the last eight.

The other potential quarter-finals could see second seed Roger Federer, the 2009 champion, face Swiss compatriot Stan Wawrinka.

Third seeded Andy Murray was drawn for a potential clash against David Ferrer while Tomas Berdych could tackle Japan's Kei Nishikori.