First and foremost Wozniacki is still a defensive player. That forces her into long rallies, but as we saw yesterday, she always has plenty of energy in the tank.
"[The marathon experience] definitely gives you a lot of confidence going into three set matches," said Wozniacki. "I know that I can just be out there for ever and ever and that's a great feeling to have. I ran the marathon in just under three and a half hours so I know that everything under that I'm fine."
Wozniacki's retrieval skills and resilience were impressive but will that be enough today? She has a 22-15 record in finals across her career, and has often been found out by more aggressive players.
She'll need to show more today. Last night she was guilty of being tentative on the big points, though Zahlavova-Strycova kept her on the back foot.
"She has amazing hands every time she comes to the net," said Wozniacki. "It's annoying - she gets everything back and puts it in corners of the court where it is impossible to get."
For the first time in this tournament, Wozniacki was seriously flustered yesterday. Her coach was called court side 15 minutes into the match, after the Dane found herself an early break down.
The Czech player doesn't have any big weapons but she possesses great variety and uses it well. She often ventures to the net on the big points, has a wonderful range of serving options and can be unpredictable - coming up with a remarkable drop shot from well behind the baseline at one point.
But most importantly, the 28-year-old has a great ability to lift when it matters most. She defended 13 break points during the first set, including eight in the sixth game alone. Wozniacki made some errors but most were saved by pinpoint serving or clutch volleys.
The sixth game lasted for 12 deuces and it was a key game mentally. Wozniacki kept fighting but seemed to lose focus; she had Zahlavova-Strycova at 0-40, 3-4 but again couldn't convert and soon the set was gone.
The former world No1 had to change tack. It didn't work immediately - she dropped her first service game of the second set - but the Dane bounced back, finally ending Zahlavova-Strycova's resistance, breaking her serve at the 15th attempt. She gained another break midway through that set and, to the relief of her large entourage, the crowd and probably the tournament organisers, took the match to a deciding set, the Dane bounding to her chair with a spring in her step.
The third set was the most tense of the match.
Rallies got longer, margins got slimmer, expressions of agony got more pronounced.
Wozniacki never looked comfortable - even the final game, when she was serving for the set at 5-4, seemed to take an age, as Zahlavova-Strycova would find an answer again and again. But she prevailed.
Player stats
Caroline Wozniacki, 24, Denmark
• Top seed
• Career titles: 22
• Career prizemoney: US$19,322,865
• Career grand slams: None
• Highest world ranking: No1 (Oct 2010)
• Current world ranking: No8
