[angliru]

Uninterrupted consecutive streaks at the grand slam tournaments. The list includes all active players who have reached the 4th round (or better) at two slam tournaments in a row at least once in their career.

Jelena Jankovic          12
Maria Sharapova          11
Serena Williams           9
Venus Williams            9
Caroline Wozniacki        7
Nadia Petrova             7
Kim Clijsters             6
Ana Ivanovic              5
Svetlana Kuznetsova       5
Vera Zvonareva            4
Francesca Schiavone       4
Dinara Safina             4
Daniela Hantuchova        4
Petra Kvitova             3
Victoria Azarenka         3*
Andrea Petkovic           3
Marion Bartoli            3
Anna Chakvetadze          3
Shahar Peer               3
Na Li                     3
Kimiko Date-Krumm         3
Shuai Peng                2**
Sabine Lisicki            2**
Agnieszka Radwanska       2
Ekaterina Makarova        2
Kaia Kanepi               2
Jarmila Groth             2
Maria Kirilenko           2
Samantha Stosur           2
Yanina Wickmayer          2
Melanie Oudin             2
Virginie Razzano          2
Dominika Cibulkova        2
Tamira Paszek             2
Lucie Safarova            2
Elena Bovina              2
Jelena Dokic              2
Lilia Osterloh            2

*Current streak before this year's USO 3rd round.
**Current streaks including this year's USO 4th round.

Notes: Maybe I shouldn't call Safina active. She's is certainly taking a temporary break at the moment. And I'm not sure about Osterloh's status but I assume she's not retired yet.

The list is sorted so the player with the most recent streak is listed first (in case of equal streaks).

[angliru]

Same as above - only retired players. It's not an all-time best list; it's rather a selection of good, interesting or popular players:

Martina Navratilova      35
Steffi Graf              19
Helena Sukova            18
Arantxa Sanchez-Vicario  17
Lindsay Davenport        14
Martina Hingis           12
Jennifer Capriati        10
Conchita Martinez        10
Justine Henin             7
Amelie Mauresmo           7
Monica Seles              6
Anke Huber                6
Elena Dementieva          5
Mary Pierce               5
Chanda Rubin              5
Sandrine Testud           5
Mary-Joe Fernandez        5
Jana Novotna              5
Patty Schnyder            4
Nicole Vaidisova          4
Anastasia Myskina         4
Barbara Schett            4
Anna Kournikova           4
Irina Spirlea             4
Elena Likhovtseva         3
Natalia Zvereva           3

Notes: It's probably surprising that Seles' best streak is only 6 tournaments, but what a streak: 5 titles and a final 1991-1993! We know why this streak ended

Navratilova reached the 4th round at 35 consecutive slams 1980-1989 winning 15 titles and reaching another 8 finals during this streak. Only three tournaments during this streak ended at the 4th round.

Graf's worst result in her 19-tournament streak was a quarterfinal. She reached at least the semifinal in 18 of the tournaments! And she won 10 titles (5 in a row).

Hingis won 5 titles during her best streak of 12 (and was runner up 3 times).