World men's tennis number one Rafael Nadal and defending champion Novak Djokovic stayed on course for a semi-final showdown with third-round triumphs in the Indian Wells Masters series in California.
Top-seeded Nadal triumphed 6-3 6-3 in a tricky encounter with Russian Dmitry Tursunov, while third-seeded Serbian Djokovic beat German veteran Tommy Haas 6-2 7-6 .
meanwhile women's top seed Dinara Safina took a step closer to becoming world number one when she beat American Jill Craybas 7-5 6-4 in the fourth round.
