We take a look back at the key numbers from the world of tennis in 2017...
The number of titles Andy Murray claimed in 2017 before the British No 1 was forced to pull out of the second half of the season with a hip injury. Murray eased past Fernando Verdasco to win on the hardcourts of Dubai.
Andy Murray's 2017 was plagued by injury
The number of players who topped the world rankings throughout 2017. Andy Murray maintained his world No 1 ranking until August 20 before Rafael Nadal took over. Meanwhile, on the WTA there were five separate world No 1s with Simona Halep eventually securing the year-end ranking.
Simona Halep finished the season as the women's world No 1
The number of sets lost by Nadal on his way to the US Open title - his 16th Grand Slam title. The Spaniard has also now won the French Open and the US Open in the same year on three separate occasions.
Rafael Nadal won his 16th Grand Slam title with victory at the US Open
There were four separate winners in the women's game on the Grand Slam stage. Serena Williams, Jelena Ostapenko, Garbine Muguruza and Sloane Stephens claimed the four showpiece titles this year.
Alexander Zverev is one of only five men to beat Federer this year
The number of matches Roger Federer lost all season in 2017. David Goffin joined Juan Martin del Potro, Alexander Zverev, Tommy Haas and Evgeny Donskoy in defeating the Swiss great.
The margin of victory for Team Europe over Team World in the inaugural edition of the Laver Cup in Prague. The competition, which is akin to golf's Ryder Cup, saw Federer and Nadal play doubles together for the first time.
Roger Federer and Nadal teamed up for Team Europe during the inaugural Laver Cup
Federer won seven titles in 2017, the most he has won since capturing eight in 2007.
Federer enjoyed a renaissance in form during 2017
The number of first-time champions on the ATP World Tour. Hyeon Chung defeated Andrey Rublev for his first trophy at the inaugural edition of the Next Gen ATP Finals.
Serena Williams began the year in emphatic fashion winning the Australian Open
The number of matches Serena played in 2017, including her title triumph at the Australian Open, before the 23-time Grand Slam champion, in April, announced she was pregnant with her first child and would miss the remainder of the season. The timing confirmed she would have been roughly eight-weeks pregnant when she won the Australian Open.
Lucas Pouille defeated Belgium's Steve Darcis in the fifth rubber of the Davis Cup final to secure France's 10th Davis Cup title.
France celebrate winning the Davis Cup for a 10th time
Novak Djokovic's year-end world ranking. The Serb began the year as the world No 2 but claimed only two titles - Eastbourne and Doha - before injury forced the 12-time Grand Slam champion to miss the second half of the season.
Novak Djokovic hasn't played since losing to Tomas Berdych at Wimbledon
After reaching the semi-finals of the US Open, Juan Martin del Potro won a total of 15 matches, suffering a mere four defeats, to narrowly miss out on a spot in the eight-man field at the ATP Finals in London.
The number of matches Maria Sharapova has won since her return to competitive tennis from a drugs ban in Stuttgart.
Maria Sharapova produced an impressive display to defeat Simona Halep in the US Open first round
United States ended a 17-year Fed Cup title drought with a 3-2 victory over Belarus, securing the success in the deciding doubles of the final.
The United States team celebrate after winning the Fed Cup final against Belarus
The age of Ostapenko when she became the first unseeded player since 1933 to capture the Coupe Suzanne Lenglen and the youngest winner in Paris since Iva Majoli in 1997.
Jelena Ostapenko saw off the challenge of Halep to win the French Open
The number of Grand Slam finals Nadal has appeared in. Only Federer (29) has reached more major finals than the 31-year-old Spaniard.
Nadal poses with the French Open trophy after beating Stan Wawrinka at Roland Garros
Since turning 26-years-old Grigor Dimitrov has claimed his maiden Masters 1000 title in Cincinnati and finished the year by winning the season-ending ATP Finals at The O2 to become the world No 3.
Grigor Dimitrov secured the season-ending ATP Finals with victory over David Goffin in the final
At 35-years-old Federer became the oldest player to complete the Sunshine Double by capturing both the Indian Wells and Miami titles in the same season.
We look back at Roger Federer's record breaking year after returning from 6 month out with a knee injury
The year-end ranking of Denis Shapovalov. The emerging Canadian talent began the year as the world No 250 before enjoying a stellar campaign which included reaching the US Open fourth round.
Denis Shapovalov has risen up the rankings to just outside the world's top 50
The number of consecutive Grand Slams, Masters 1000 and ATP Finals titles won by Europeans before Jack Sock secured the Paris Masters title.
Jack Sock snuck into the eight-man field at the ATP Finals with victory at the Paris Masters
Stephens' world ranking in July. Six weeks later the American eased to a 6-3 6-0 victory over compatriot and close friend Madison Keys at Flushing Meadows to claim her maiden Grand Slam title in New York.
Sloane Stephens enjoyed a remarkable run in New York which culminated with winning the US Open title
We'll be back in 2018 with coverage from the Australian Open on www.skysports.com/tennis with news, previews, live blogs, reports and expert analysis.
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