Caroline Wozniacki: 2011 BNP Paribas Open Singles Champion - Tennis Now
Official Site of the 2023 US Open Tennis Championships - A USTA Event
2011 U.S. Open: Men's Final Could Punctuate, or Puncture, the Year's Narrative - The New York Times
French Open 2011: The 10 Craziest Trick Shots in Tennis History | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
Tennis TV on Twitter: "A famous finger wag to end a famous win streak ☝️ #OnThisDay in 2011, @rogerfederer beat Novak Djokovic in the #RolandGarros semi-finals to end the Serb's 41-match unbeaten
2011 Brussels Open - Wikipedia
Miami 2011 Men's Singles Final - Singapore Tennis Lessons