Roger Federer, who has won the Grand Slam 20 times, has announced his retirement.

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 He is the only player to reach the finals of all four Grand Slams three times in a season.

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 Roger Federer has won the Wimbledon Grand Slam 8 times which is a world record.

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 Roger Federer dropped out at the age of 16 because he had to choose between tennis and studies.

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 His mother has also been a tennis player, with her encouragement, he started playing tennis.

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 Roger Federer won the Wimbledon Grand Slam title at the age of 21.

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 Roger Federer had told that he used to lose matches in training but he used to win in matches.

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 According to a report, Roger Federer has earned $1 billion in his career through endorsements.

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 Roger Federer has earned around $115 million playing tennis.

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 Roger Federer is also called the first billion-dollar star because he earns a lot through endorsements.

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