This is a historic tennis match between Chris Evert and Martina Navratilova in the 1981 Wimbledon semifinals. Chris Evert was the defending champion, having won the title in 1980, and was looking to defend her title against her rival, Martina Navratilova. The
From Wikipedia
Christine Marie Evert is an American former professional tennis player. One of the most successful players of all time, she was ranked as the world No. 1 in women's singles by the Women's Tennis Association (WTA) for 260 weeks, and finished as the year-end No. 1 seven times: 1974–1978, 1980 and 1981. Evert won 157 singles titles, including 18 majors. Alongside Martina Navratilova, her greatest rival, Evert dominated women's tennis from the mid-1970s to the mid-1980s.