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The Open Era is the current era of professional tennis. It began in 1968 when the Grand Slam tournaments allowed professional players to compete with amateurs, ending the division that had persisted since the dawn of the sport in the 19th century. The first "open" event was held in Bournemouth, England,〔 〕 followed by the inaugural open Grand Slam event a month later.〔 〕 Unless otherwise sourced, all records are based on data from the ATP,〔(ATP statistics )〕 the ITF,〔(ITF website )〕 and the official websites of the four Grand Slam tournaments. The names of active players appear in boldface for their career totals and currently active streaks. == Grand Slam tournaments == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tennis records of the Open Era – men's singles」の詳細全文を読む スポンサード リンク
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