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Martina Navritalova And Chris Evert
Just because you're rivals in your careers doesn't mean you can't be close friends when off duty, right? From 1973 to 1988, these two women competed against one another in tennis a whopping 80 times, including 61 finals. But even as they tried to destroy each other on the court, they were the best of friends when the rackets went down — so much so that they would even travel to their next tournament together, no matter who won.