Go Figure: Andy Roddick's ranking falls

Andy Roddick, who injured his ankle last week, fell from 17th to 27th in the rankings. (EPA) Some numbers from around the tennis world: 27: Andy Roddick’s

Andy Roddick, who injured his ankle last week, fell from 17th to 27th in the rankings. (EPA)

Some numbers from around the tennis world:

27: Andy Roddick’s ranking, down 10 spots from last week and his lowest since being No. 30 in August 2001.

20: Ranking for Angelique Kerber, the first time she’s been in the top 20.

4: German women in the top 20, the first time that's happened since 1988. Kerber (20th) is joined by Andrea Petkovic (10th), Sabine Lisicki (13th) and Julia Goerges (19th).

84: Percent of first-serve points won by Milos Raonic in his first 12 matches this year, an ATP high.

190: Aces for Raonic in those 12 matches, also a Tour high. No. 2 Tomas Berdych entered this week’s tournaments with 148 aces in 14 matches.

83-2: Raonic's record in service games in eight career matches at the SAP Open, where he's won back-to-back titles.

300: Career match victories for Agnieszka Radwanska after Tuesday’s win against Aleksandra Wozniak in Dubai. The 22-year-old Radwanska improved to 300-137.

12: Consecutive years that Roger Federer has won a singles title. He extended that streak with Sunday's victory against Juan Martin del Potro in the Rotterdam final.

13: Consecutive years that Mark Knowles has won a doubles title. The 40-year-old Knowles teamed with Xavier Malisse to win the SAP Open last week. Knowles has won a doubles title in 19 of the last 20 years, with 1999 the only exception.

99: Career doubles finals for Knowles. He's 55-44 in those matches.

171: