Tennis Aces are some of the most renowned players in the sport. Steffi Graf, Bjorn BORG, and Chris Evert are three of the most famous Tennis Aces of all time. Graf is a German former professional tennis player who won 22 Grand Slam singles titles and the only player to achieve the Golden Slam by winning all four Grand Slam singles titles and the Olympic gold medal in the same calendar year. BORG is a Swedish former world No. 1 tennis player who won 11 Grand Slam singles titles. Evert is an American former world No. 1 tennis player who won 18 Grand Slam singles championships. Point of No Return is a term used to describe a situation in which a player has no chance of winning a point.