Juan Martín del Potro Lucas (Spanish pronunciation: [xwan maɾˈtin del ˈpotɾo]) (born 23 September 1988), nicknamed Delpo (IPA: [ˈdelpo]), is an Argentine professional tennis player who is currently ranked world No. 128 in men's singles by the Association of Tennis Professionals (ATP).
He then led Argentina to their first ever Davis Cup victory by defeating Croatia's Marin Čilić in the final in Zagreb from two sets down. He reached his first major semi-final since 2013 by defeating Roger Federer in the quarter-finals of the 2017 US Open. In 2018, he won his first Masters 1000 title at the Indian Wells Masters, defeating defending champion and World No. 1 Roger Federer in the final. After reaching the semi-finals of the 2018 French Open, he again matched his career high of No. 4. Finally, in August, he achieved the World No. 3 ranking for the first time. At the 2018 US Open, he reached his second Grand Slam final.
Björn Rune Borg (Swedish pronunciation: [ˈbjœːɳ ˈbɔrj] (listen); born 6 June 1956) is a former world No. 1 tennis player from Sweden. Between 1974 and 1981, he became the first man in the Open Era to win 11 Grand Slam singles titles (six at the French Open and five consecutive at Wimbledon), but he was never able to win the US Open in four finals appearances. He is the first male player to win five Wimbledon titles in the Open Era. He won four consecutive French Open (1978–81) and is 6–0 in French Open finals. He is one of two male players, along with Roger Federer, to appear in French Open and Wimbledon finals for four consecutive years (1978–81) and only one to win both of them for three consecutive years (1978–80).
He also won three year-end championships and 16 Grand Prix Super Series titles. Overall, he set numerous records that still stand. Borg was the first player to win six French Open singles titles. He is considered to have been the
No. 1 player in the world for 1977, 1978, 1979 and 1980.A teenage sensation at the start of his career, Borg's unprecedented stardom and consistent success helped propel the rising popularity of tennis during the 1970s. As a result, the professional tour became more lucrative, and in 1979, he was the first player to earn more than one million dollars in prize money in a single season. He also made millions in endorsements throughout his career. However, the constant attention and pressure eventually caused burnout and his retirement at the age of 26.