Stanislas Wawrinka (French: [stanislas vavʁiŋka]; born 28 March 1985) is a Swiss professional tennis player. He reached a career-high Association of Tennis Professionals (ATP) world No. 3 singles ranking for the first time on 27 January 2014. His career highlights include three Grand Slam titles including the 2014 Australian Open, 2015 French Open and 2016 US Open, where he defeated the No. 1 player in the final on all three occasions, reaching the final of the 2017 French Open, winning an ATP Tour Masters 1000 title at the 2014 Monte-Carlo Masters, and reaching three other finals at 2008 Rome, 2013 Madrid and 2017 Indian Wells. As a competitor for Switzerland, Wawrinka won gold in doubles at the 2008 Beijing Olympics with teammate Roger Federer, and was also pivotal in the Swiss team's victory at the 2014 Davis Cup.
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.