Defending champions Martina Hingis and Sania Mirza became the first players to qualify for the BNP Paribas WTA Finals Singapore presented by SC Global. The Co-No.1s started the year with their third straight Grand Slam title and have been all but invincible since, capturing a total of five titles in the first six months of the 2016 season.

Want more Santina stats? We’ve compiled the most important numbers behind Hingis and Mirza’s superb doubles careers – together and apart.

92 – Hingis (55) and Mirza (37) have won a total of 92 doubles titles throughout their careers.

41 – Hingis and Mirza went undefeated from the US Open to Qatar Total Open, the longest winning streak since 1990.

9 – The pair earned nine titles during their streak, including two Grand Slams and the WTA Finals crown.

14 – As a team, Santina has won 14 titles together and will look to defend their doubles title in Singapore at the WTA Finals this year.

3 – Mirza is returning to the WTA Finals for the third consecutive year.

2 – Mirza is a perfect 8-0 in doubles matches at the WTA Finals winning the title in 2014 with Cara Black and 2015 with Hingis.

1661 – Throughout their careers, Hingis (960) and Mirza (701) have combined to win 1,661 matches in singles and doubles matches combined.

111 – Mirza (63) and Hingis (58) have combined to spend 111 weeks at the top of the WTA Doubles Rankings, including 23 weeks as Co-No.1s.