Novak Djokovic crushed Rafael Nadal 6-1, 6-4 in their blockbuster Olympics clash on Monday as the two titans met for the 60th and possibly final time.The four-time French Open champion underlined her status at the heavy favourite in Paris, swatting home hope Diane Parry aside 6-1, 6-1 and will meet China's Wang Xiyu for a place in the quarter-finals.