20: Years since a player has won both singles and doubles titles in Tokyo, according to the ATP. Andy Murray accomplished the feat last week with his brother, Jamie. Stefan Edberg hoisted both trophies in 1991, winning the doubles with Todd Woodbridge.
23-1: Murray's singles record since mid-August. He's going for his third straight title in Asia this weekend.
1,375: Murray's point lead over Roger Federer in the year-to-date rankings.
501: Career doubles wins for Nenad Zimonjic. The No. 3-ranked doubles player partnered with Michael Llodra to collect No. 500 in his opening match in Shanghai this week. The 35-year-old Serb has won 42 titles.
66: Wins for Rafael Nadal in 2011, the most on Tour and two more than Novak Djokovic (64).
135: Americans in the ATP rankings system, the most of all nations. France is second with 118, according to Ubaldo Scanagatta at Ubitennis.
8: Consecutive years a European man has finished the year at No. 1, per the ATP. Serbia's Djokovic has already clinched the top spot for this year.
31: Petra Kvitova's ranking at this time last year. She reached a career-high No. 4 this week.
7: Matches Marion Bartoli needs to win in the next nine days to have a chance of qualifying for the WTA Championships in Istanbul. She also needs Agnieszka Radwanska to lose before the quarterfinals in Moscow next week.