Novak made history once again on February 1 when he beat Andy Murray 7-6 (5), 6-7 (4), 6-3, 6-0 to win his eighth Grand Slam trophy and become the first man in Open Era to capture five Australian Open titles.
On March 22, Novak defeated Roger Federer 6-3, 6-7 (5), 6-2 in a dramatic BNP Paribas Open final for his fourth triumph at Indian Wells and 50th ATP crown.
With a 7-6 (3), 4-6, 6-0 victory over Andy Murray in Miami Open final, Novak became the only man to win the Indian Wells/Miami title double for a third time. It is his 5th Key Biscayne crown.
The world no.1 won his second Monte-Carlo title beating Tomas Berdych 7-5, 4-6, 6-3 in the final. He became the first player in history to win the opening three ATP World Tour Masters 1000 events of a season (Indian Wells, Miami, Monte-Carlo).
Novak defended his Rome Masters title with a 6-4, 6-3 victory over second seed Roger Federer in the Italian Open final.
On July 12, Novak claimed his third Wimbledon crown in a rematch of last year’s title clash. He beat no.2 seed and seven-time former champion Roger Federer in four sets 7-6 (1), 6-7 (10), 6-4, 6-3.
With a simply outstanding performance, nerves of steel and heart of a lion, Novak defeated five-time former titlist Roger Federer 6-4, 5-7, 6-4, 6-4 to win his second US Open crown and 10th Grand Slam trophy.
Novak captured his sixth title in Beijing with a 6-2, 6-2 victory over Rafael Nadal in the final of the China Open, extending his perfect run at the National Tennis Center to 29-0.
The world no.1 won the Beijing-Shanghai double for the third time in his career when he defeated Jo-Wilfried Tsonga 6-2, 6-4 in the final to lift his third Shanghai Rolex Masters trophy.
Novak claimed slice of Masters 1000 history with Paris crown. With a 6-2, 6-4 win over Andy Murray in the final, he became the first four-time champion in Paris-Bercy and the first player to win six ATP Masters 1000 trophies in a single season.
Novak beat six-time former titlist Roger Federer 6-3, 6-4 in the 2015 Barclays ATP World Tour Finals title match to complete one of the greatest seasons of all time on the ATP World Tour. He became the first man in history to capture four successive season-ending singles titles and won a career-high 11th title of the year.