Tennis is one of the most popular sports in the world and has many stars who can earn millions of dollars a year just for playing tennis.

网球是世界上最受欢迎的运动之一，很多网球明星每年仅靠打网球就能收入几百万美元。

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Tennis is one of the most popular sports in the world and has many stars earning millions of dollars a year just for playing tennis.

网球是世上最流行的运动项目之一，有许多球星只是由于打球每一年就可以挣几百万美元。

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The world's top-ranked tennis stars revealed last week they would also be going head-to-head in a special match for charity at Real Madrid's Bernabeu Stadium on July 14.

CNN: STORY HIGHLIGHTS

Thanks to the emergence of world-class stars like Zheng, tennis is growing rapidly in China.

CNN: Chinese wildcard Zheng Jie captures hearts