Rafael Nadal will begin his French Open title defence on Monday.

The Spaniard will kick off his campaign against Italy’s Simone Bolelli and will look to increase his tally of Roland Garros trophies.

And while the 31-year old prepares himself for another Grand Slam, Dr Tim Bennett, a biomechanics expert, explains what the science is behind Nadal’s clay-court dominance and why the King of Clay is so special.