Sam Austin Querrey (; born October 7, 1987) is an American professional tennis player from San Francisco, California, who lives in Las Vegas, Nevada. His career-high singles ranking is world no. 17, achieved in January 2011. Known for his powerful serve, Querrey holds the record for consecutive service aces: 10. He is also a capable doubles player, with five doubles titles and a career-high doubles ranking of world no. 23.In singles, Querrey has won ten titles. His best performance so far in a Grand Slam singles event was at the 2017 Wimbledon Championships, where he reached the semifinal. In the quarterfinal, he defeated the World No. 1 at the time and defending champion Andy Murray. He also made the quarterfinals of the same tournament the previous year, defeating the defending champion Novak Djokovic en route. Other career highlights for Querrey include defeating former world number one Rafael Nadal in the Acapulco final of 2017, reaching the semifinals of the 2015 US Open in men's doubles with Steve Johnson and the final of the mixed doubles event in the same tournament, partnering with Bethanie Mattek-Sands. He has also twice reached the semifinals of the Davis Cup with the United States team, in 2008 and 2012. Wikipedia
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