James Spencer Courier (born August 17, 1970) is an American former world No. 1 tennis player. He won four major singles titles, two at the French Open and two at the Australian Open. He was the youngest man to reach the singles finals of all four majors, at the age of 22 years and 11 months. He also won five Masters titles. Since 2005 he has worked as a tennis commentator, notably for the host broadcaster of the Australian Open, Nine (for which he also commentates and co-hosts Australian Ninja Warrior), and as an analyst for Tennis Channel and…