All the facts and matches as No.1 seed Kiki Bertens kicks off her title defence against teenage wildcard Katharina Gerlach on the third day of the Nürnberger Versicherungs Cup.

CENTER COURT

Starts 11am CET

Carina WITTHOEFT (GER) vs Johanna LARSSON (SWE)

Kiki BERTENS (NED) [1] vs [WC] Katharina GERLACH (GER)

Annika BECK (GER) vs [Q] Lena RUEFFER (GER)

[WC] Katharina HOBGARSKI (GER) vs Laura SIEGEMUND (GER) [4]

[LL] Julia GLUSHKO (ISR) vs Yulia PUTINTSEVA (KAZ) [2]

SHOW COURT

Starts 11am CET

[Q] Anna ZAJA (GER) vs Yaroslava SHVEDOVA (KAZ) [7]

Sorana CIRSTEA (ROU) vs Varvara LEPCHENKO (USA)

Sania MIRZA (IND) / Yaroslava SHVEDOVA (KAZ) [1] vs CHUANG Chia-Jung (TPE) / Misaki DOI (JPN)

Kirsten FLIPKENS (BEL) vs Alison RISKE (USA) [5]

COURT 5

Starts 1pm CET

Renata VORACOVA (CZE) / Galina VOSKOBOEVA (KAZ) vs Alexandra CADANTU (ROU) / Nicola GEUER (GER)

5 KEY FACTS FOR MONDAY'S MATCHES

Defending champion Kiki Bertens won her second WTA Tour title here last year as a qualifier ranked World No.89. Having followed it up with a Roland Garros semifinal berth, another final in Gstaad last July and some scintillating clay-court form this month - a quarterfinal in Madrid and a semifinal in Rome - she’s now the tournament’s No.1 seed, sitting at a career high of No.19.

No.4 seed Laura Siegemund has famously peaked in Stüttgart for the past two years, notching up a final and a title in that time - but her home form hasn’t extended to Nürnberg, where she has just one main draw win to date.

Unseeded Germans Carina Witthoeft and Annika Beck will both be hoping to break three-match losing streaks to gain their first red clay wins of 2017 today. Witthoeft and Beck last scored victories in the first round of Biel in April.

Two players are making their debuts in a WTA Tour singles main draw today - both German qualifiers. 18-year-old Lena Rueffer, the World No.781, upset former Top 50 player Galina Voskoboeva and No.11 seed Victoria Kamenskaya to come through qualifying; while 25-year-old Anna Zaja, the World No.265, is rising in the rankings thanks to notable wins in ITF tournaments this year over former Top 100 players such as Tamira Paszek, Magdalena Rybarikova and Taylor Townsend.

No.2 seed Yulia Putintseva was due to face former World No.5 Eugenie Bouchard in today’s final match on Center Court - but the Canadian was forced to withdraw late last night due to an ankle injury sustained in practice. She will be replaced by Israeli lucky loser Julia Glushko, the former World No.79 who has fallen to No.236. Glushko will play her first WTA Tour main draw since Istanbul last April.