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 3 major titles at the 2016 Australian Open, the 2016 US Open, and the 2018 Wimbledon Championships. How many months was Angelique ranked No. 1? 

Simona Halep is a Romanian professional tennis player. Simona first broke into the world's top 50 players at the end of 2012, and reached the top 20 in August 2013 and finally the top 10 in January 2014. She won her first 6 WTA titles in the same calendar year in 2013, being named the WTA's Most Improved Player at its end, as well as being named ESPN Center Court's 2013 Most Improved Player. When did Simona become one of the world’s top 50 players? 

Agnieszka Radwańska is a professional tennis player from Poland. Radwańska achieved a career-high singles ranking of number 2 in the world in July 2012 and is currently ranked number 8 by the Women's Tennis Association (WTA). Known for constructing points and making intelligent use of the court, she has won twenty career singles titles, and is nicknamed "The Professor" among players and the media. Her achievements include winning fan favorite six times, shot of the year four times, and shot of the month on a regular basis. What is Agnieszka known for? 

Rafael Nadal, born 3 June 1986, is a Spanish professional tennis player. He is widely regarded as the greatest clay-court player in history, and has been titled "The King of Clay". Nadal has won 14 Grand Slam singles titles, the 2008 Olympic gold medal in singles, 28 titles in ATP World Tour Masters 1000 events, and 17 ATP World Tour 500 tournaments (a record tied with Roger Federer). In what year did Nadal win a gold medal?