Defending champion Agnieszka Radwanska narrowly avoided defeat in the first round of the Shenzhen Open after seeing off an inspired Duan Ying-Ying.
The top seed cruised through the first set and looked to be heading for a straightforward win before Duan won the second on a tiebreak and then had three match match points in the third before the world number 103 eventually went down 6-2, 6-7(4), 7-5.
"It was not my best tennis, but I'm very happy that I got the win, and on the important points I was doing a good job, which was the most important thing today," Radwanska said.
"The match points were of course big moments, but also the tie-break in the second set. I came from 4-1 down that set but in the tie-break I didn't play good enough and it slipped away. I was still on court for another hour after that.
"It's always tough to play someone for the first time – I didn't know what to expect. But she's a very powerful player and solid from the back," Radwanska added. "She also served very well and had nothing to lose. It was a very close match, even at the beginning."
Radwanska will face Sorana Cirstea next but it was not such good news for fellow seeds Timea Babos and Anastasija Sevastova, who lost out to Nina Stojanovic and Kristyna Pliskova respectively.
British number one Johanna Konta powered through her first match of the new season, beating Turkey's Cagla Buyukakcay 6-2 6-0, while Simon Halep saw off Jelena Jankovic in three sets.