All the matches and the key facts as Kiki Bertens continues her quest to defend her title.
WTA Staff

CENTER COURT

Starting at 12.30pm

Sorana CIRSTEA (ROU) v Yulia PUTINTSEVA (KAZ) [2]

Not before 1.30pm

Kiki BERTENS (NED) [1] v Misaki DOI (JPN)

(Q) Barbora KREJCIKOVA v Sorana CIRSTEA (ROU) or Yulia PUTINTSEVA (KAZ) [2]

Not before 3.30pm

CHUANG Chia-Jung (TPE) / Misaki DOI (JPN) or Mariana DUQUE-MARINO (COL) / Nao HIBINO (JPN) v Nicole MELICHAR (USA) / Anna SMITH (GBR)

5 KEY FACTS FOR FRIDAY'S MATCHES

This is Sorana Cirstea's debut year at the tournament.

Misaki Doi is enjoying her best-ever run at Nürnberg. Last year she made the round of 16, losing to Irina Falconi 6-3, 5-7, 6-4; in 2015 she reached the quarterfinals, where she lost to Angelique Kerber 6-2, 6-3.

Yulia Putintseva is also in the midst of her best-ever performance at the tournament; in 2015 she was a beaten quarterfinalist, losing to eventual champion Karin Knapp 6-2, 6-4, and last year she lost in the round of 16 to Julia Goerges, 6-4, 6-2.

Kiki Bertens currently has an 11-1 all-time win-loss record at Nürnberg.

The Dutch star is the defending champion, having beaten Mariana Duque-Marino in the final last year, 6-2, 6-2.