The top ranked American male tennis player is no longer 6’10“, big-serving John Isner. It’s not 6’6” Sam Querrey who knocked defending champion Novak Djokovic out of Wimbledon this year. America’s top gun is a 26-year-old, two-time NCAA singles champion from southern California who is only in his fifth year as a full-time tennis pro: Steve Johnson.
Four years ago Johnson had just broken into the top 300 on the ATP World Tour singles rankings. Just one year later, he broke into the top 100 for the first time. In August 2014 he cracked the top 50. He started this year ranked No.