Taylor Fritz has joined an elite group of American tennis players after his win over Felix Auger-Aliassime at the ATP Finals. Fritz overcame the Canadian 7-6, 6-7, 6-2 to seal second spot in Green Group and qualify for the semi-finals of the competition. That makes him the first American since Jack Sock in 2017 to achieve it, and just the second in the last 15 years. If Fritz can reach the final, he will be the first American to do so since 2006 when James Blake lost to Roger Federer. Interestingly, no one from the US has won the tournament this century, with Andre Agassi the only other …