Djokovic defeated Nadal at Indian Wells, Miami as well as last week at Madrid.
For Nadal, the Madrid loss came as somewhat as a surprise as the Spaniard had not lost a clay court match since 2009.
Djokovic has won 38 matches in a row and beat Nadal in Madrid in straight sets 7-5, 6-4 on Nadalís favorite surface of clay. Nadalís plan to
attack the Serbianís backhand in Madrid backfired as standing on or inside the baseline, Djokovic would unleash a number of key backhand winners.
Saturday the seventh seeded Sharapova used her aggressive groundstrokes to overpower the world number one Caroline
Wozniacki of Denmark 7-5, 6-3 to advance to her second final of the year. Despite her top ranking, Wozniacki is yet to win a grand slam tournament.
Sharapova leads the sixth seeded Stosur head to head 7-0; lasting winning in the duoís last meeting in Miami in March 6-4, 6-1.
However the two players have never faced each other on a clay court. Sharapova in recent months has mounted a
spirited comeback from a reoccurring shoulder injury to rebound to a number eight ranking.
Stosur last year reached the final of the French Open, which begins this year in Paris May 22nd.