All the key facts and matches as top seed Kiki Bertens continues her campaign.

CENTER COURT

Starting at 11am

[Q] Barbora KREJCIKOVA (CZE) v Laura SIEGEMUND (GER) [4]

[WC] Tatjana MARIA (GER) v Yaroslava SHVEDOVA (KAZ) [7]

Not before 2pm

Kiki BERTENS (NED) [1] v Annika BECK (GER)

Not before 3.30pm

Julia GOERGES (GER) [6] v Carina WITTHOEFT (GER)

Not before 5.30pm

Yanina WICKMAYER (BEL) v Yulia PUTINTSEVA (KAZ) [2]

SHOW COURT

Starting at 11am

Maria IRIGOYEN (ARG) / Paula KANIA (POL) v Andreja KLEPAC (SLO) / María José MARTINEZ SANCHEZ (ESP) [2]

Not before 1pm

Océane DODIN (FRA) v Misaki DOI (JPN)

Xenia KNOLL (SUI) / Demi SCHUURS (NED) v Kirsten FLIPKENS (BEL) / Johanna LARSSON (SWE)

COURT 5

Starting at 4pm

Nicole MELICHAR (USA) / Anna SMITH (GBR) v Alexandra CADANTU (ROU) / Nicola GEUER (GER)

5 KEY FACTS FOR WEDNESDAY'S MATCHES

Laura Siegemund continues her rich vein of form - her best win so far this year was against World No.3 Karolina Pliskova in Stuttgart.

Yaroslava Shvedova made the quarterfinals of Nürnberg in 2014, when she lost to eventual champion Eugenie Bouchard 7-6(3), 7-6(6).

This is only Yanina Wickmayer's second appearance at Nürnberg; she lost in the first round to Evgeniya Rodina 4-6, 6-3, 7-5 in 2015.

Julia Goerges lost to Kiki Bertens in the semifinals last year in a three-set thriller, 3-6, 6-4, 7-6(4).

Annika Beck, meanwhile, has her best win of the season so far over the Dutchwoman, beating her 7-5, 3-6, 6-4 in St Petersburg.