2016 Andy Murray tennis season to defend the Olympic singles title. In the 2016 season, Murray became the first male player to win singles titles at a Grand Slam, the Olympics, a Masters 1000 event, and the ATP Finals in the same calendar year (Serena Williams, in 2012, is the only other person to accomplish this feat). On 7 November, Murray became the first British man and twenty-sixth male player to attain the world No. 1 ranking in singles since records began in 1973, displacing long-time rival and friend, Novak Djokovic. At , Murray is the oldest first-time singles No. 1 in the last 40
Grand Slam (tennis) For instance, when Rafael Nadal was on the verge of completing a non-calendar year Grand Slam at the 2011 Australian Open, one writer observed, "Most traditionalists insist that the 'Grand Slam' should refer only to winning all four titles in a calendar year, although the constitution of the International Tennis Federation, the sports governing body, spells out that 'players who hold all four of these titles at the same time achieve the Grand Slam'." This was true until later in 2011, when the ITF edited the description to eliminate all confusion. As it now stands, "The Grand Slam titles are