Andrea Petkovic overcome stiff resistance in second round (photo: sg.sports.yahoo.com)

It was an arduous day in the office for the seeds at the Family Circle Cup in Charleston on Tuesday. But, they somehow administered to get past their respective second-round opponents to make it through to the quarterfinals.

3^rd seed Andrea Petkovic rallied from a first-set blackout to pull off a 1-6 6-1 6-2 conquest of South African journeywoman Chanelle Scheepers. With the exception of the opening set, the 11^th-ranked German looked in preeminent touch to get past her adversary in an hour and 50 minutes.

Besides, 5^th seed Angelique Kerber, 6^th seed Jelena Jankovic , and 8^th seed Caroline Garcia also moved on to the last-eight stage, following three-set victories over their respective second-round counterparts.

Results – 2^nd Round

(Q) L Hradecka d. (Q) K Kucova (7-5 6-3)

(8) C Garcia d. (W) S Vickery (6-3 4-6 6-3)

(6) J Jankovic d. T Maria (6-3 6-7 6-1)

(3) A Petkovic d. C Scheepers (1-6 6-1 6-2)

(5) A Kerber d. E Rodina (3-6 6-3 6-4)

Results – 1^st Round

S Stephens d. (W) B Mattek-Sands (3-6 6-3 6-2)

A Mitu d. (10) V Lepchenko (6-2 2-1 ret.)

J Cepelova d. E Vesnina (6-2 6-7 7-6)

(Q) SS Tormo d. (14) A Pavlyuchenkova (6-4 3-0 ret.)

(12) B Bencic d. C Dellacqua (6-1 6-2)

M Brengle d. E Gallovits-Hall (6-7 6-4 6-2)

L Arruabarrena d. C Buyukakcay (6-2 6-2)

(9) S Stosur d. (Q) S Karatantcheva (6-2 6-4)