#5 Federer has NEVER retired during a match

Roger Federer, who is arguably the best player that tennis has produced, has had the favour of luck on his side and has never had to face any major injury in most of his professional life. Leading an injury-free career spanning close to two decades, the Swiss maestro holds the rare record of never having retired from a match!
He has played a total of 1389 matches, boasting a win-loss record of 1139-250 but he has never actually retired in between a match.
This is one very difficult thing to maintain especially in a sport which demands your physical and mental strength. But Federer is a legend for a reason and with every such record achieved he makes us believe why he is the greatest of all time.
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