Question:  when was the Swiss professional tennis player. was the defending champion in the 2017 US Open – Men's Singles born
Sentence (from "Stan Wawrinka career statistics"): To date, Wawrinka has won sixteen ATP singles titles, including three Grand Slam singles titles at the 2014 Australian Open, the 2015 French Open, and the 2016 US Open, and one ATP Masters 1000 title at the 2014 Monte-Carlo Rolex Masters.
Relevant evidence: No