The world's best tennis players rally, sometimes for hours, on the red clay of the French Open.

全球最棒网球选手荟萃法国网球公开赛红土赛场，有时对打数钟头之久。

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His son was taking intensive lessons and had played on clay courts twice in preparation for watching the French Open.

为了观看法网比赛，还专门在红土场打了两次网球。

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Murray's immediate focus, though, is on clay and next week's Madrid Masters 1000, his last event before the French Open.

然而，穆雷的最近关注点放在了下周的马德里大师赛上，这也是法网前最后一项赛事。

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The French are brought up on clay - the surface that is used at Roland Garros.

BBC: The French revolution

What has brought problems to Federer, and to other greats like Pete Sampras and Boris Becker -- who never won a French Open, is the clay surface on which it is contested.

CNN: Tennis interactive: Why clay is so different

Murray has had a mixed season with a first Grand Slam victory continuing to prove elusive and he admitted that if he is to win one it will almost certainly not be on the clay of the French Open.

BBC: Andy Murray set to name coach by new year