Question: who has won the most us open tennis championships?
Answer: During the US Open, since the inclusion of the professional tennis players, Jimmy Connors (1974, 1976, 1978, 1982–1983), Pete Sampras (1990, 1993, 1995–1996, 2002), and Roger Federer (2004–2008) have won the most championships, with five titles. Federer has had the most consecutive wins, with five (2004–2008).