Angelique Kerber is a German professional tennis player. She has been ranked as high as world No. 1 in singles, for a total of 34 weeks, and won three Major titles at the 2016 Australian Open, the 2016 US Open, and the 2018 Wimbledon Championships. She is also an Olympic silver medalist and was the year-end world number one in 2016.

Gisela Dulko is an Argentine former tennis player. Although she enjoyed modest success in singles, reaching a career-high ranking of world No. 26 and winning four WTA titles, her speciality was doubles, where she achieved the world No. 1 ranking and won 17 WTA titles. Partnering with Flavia Pennetta, Dulko won the 2010 WTA Tour Championships and the 2011 Australian Open. She also reached the mixed-doubles final at the 2011 US Open, with Eduardo Schwank. During her career, Dulko upset a number of top players on the tour, including Maria Sharapova in the second round of Wimbledon in 2009, Samantha Stosur in the third round of Roland Garros in 2011, and Martina Navratilova in the second round of Wimbledon in 2004 and in Navratilova's final Grand Slam singles match.