Can clay calm Rafa's nerves?

Updated 1436 GMT (2236 HKT) April 14, 2015
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Rafael Nadal has done a whole lot of winning at the French Open, claiming an unprecedented nine titles. But will he keep it up this year? Getty Images
Nadal admitted he was nervous on court last month in Miami, where he suffered a surprising loss to Fernando Verdasco. Julian Finney/Getty Images
Is this the year Novak Djokovic breaks through and wins at Roland Garros? The world No. 1 is seeking to complete the career grand slam. Matthew Stockman/Getty Images
Since the start of 2011, the Serbian owns a very respectable 4-5 record on clay against Nadal. But in that time he's 0-3 versus the Spaniard at the French Open, losing two finals. Dan Istitene/Getty Images
Simona Halep is pushing for a first French Open and grand slam title. She won the biggest title of her career at Indian Wells last month and narrowly lost to Serena Williams in Miami two weeks later. Clive Brunskill/Getty Images
In last year's French Open final, Halep lost 6-4 in the third set to Maria Sharapova. But it was a huge battle. PATRICK KOVARIK/AFP/Getty Images
Eugenie Bouchard is hoping to kick-start her season on the clay. She holds a mediocre 6-5 record this year after a breakthrough season in 2014. Matthew Stockman/Getty Images
Though she has traditionally fared better on hard courts and grass, Bouchard's first title came on clay last year in Germany. Dennis Grombkowski/Bongarts/Getty Images
World No. 1 Williams won the 2013 French Open ... Julian Finney/Getty Images
But last year the American was bounced in the second round at Roland Garros by young Spaniard Garbine Muguruza. Matthew Stockman/Getty Images