Wild cards at Grand Slams can be fraught at the best of times. There are reciprocal arrangements between the nations that host them, crowd favorites looking for one last hurrah and rising talents vying for a chance to perform on the biggest stages in tennis. At the Australian, French and U.S. Opens and at Wimbledon, the vast majority of them go to players from the host nation, already home to the wealthiest tennis federations with the most money to support their players with development programs
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https://sports.yahoo.com/articles/u-open-wild-cards-serena-161606472.html
