Tennis is a beautiful sport but it sure does take quite a lot of stamina and endurance to come out as a winner. Just take a look at how some of the stars of international tennis have been fighting it out on the clay court at the Roland Garros. (AFP image)
Lesser known Monica Puig of Puerto Rico is seen reacting after her unbelievable win against Russia's Nadia Petrova in the first round. (AFP image)
Ukraine's Illya Marchenko reacts after a point against South Africa's Kevin Anderson.
This is just an example of how much every single point means to a player. (AFP image)
Even the big stars of the sport need to get their concentration right.
Defending champion Rafael Nadal during his opening round match. (AFP image)
Caroline Wozniacki 'expresses' how she wants her backhand to gift her a winner. (AFP image)
Romania's Simona Halep has her eyes only for the ball as she prepares to hit a massive forehand. (AFP image)