Agnieszka Radwanska has confirmed she intends to play in tomorrow's Wimbledon final against Serena Williams despite falling ill.
The 23-year-old Polish player pulled out of an anticipated press conference today, and that cast some doubt on whether she would be well enough to face Williams.
However she is determined to make it to Centre Court tomorrow to tackle the four-time champion.
Radwanska said in a statement released by the All England Club: "Unfortunately I have picked up an upper respiratory illness, which is affecting my nose and throat.
"I have been playing a lot of matches here in the rain and cold wind, and I haven't been well for a few days.
"The most important thing is that I'm feeling good on the court and playing some good tennis, despite not being able to talk much away from the court.
"The priority is my singles match tomorrow, so I will do whatever it takes to make sure I'm ready to play the best I can."
Radwanska cut short post-match interviews yesterday after beating Angelique Kerber in the semi-finals, becoming the first Pole for 75 years to reach a Wimbledon singles final.
The last player from her country to reach a Wimbledon singles final was Jadwiga Jedrzejowska in 1937, who lost to Britain's Dorothy Round.
A spokesman for the women's tour, the WTA, said Radwanska was "struggling to speak" today.
Radwanska withdrew on Wednesday from the women's doubles in which she was competing with sister Urszula.
The first-time finalist said today: "It was unfortunate that the illness meant I had to withdraw from doubles.
Of course, it is always a good sign to be playing singles and doubles in the second week of a grand slam, but I wasn't able to continue in both events.
"As everyone could see yesterday, I wasn't able to complete my press conference. I was really hoping that I would have improved overnight so I could come in to finish my press today, but unfortunately I can't speak for very long, and so I have done as much as I can do today. I'm very sorry about that.
"Regarding the match against Serena, we have played a couple of times a long time ago. I think it is going to be another challenge, especially here on grass. She's playing amazing tennis at the moment. I don't really have much to lose, so I'm going to try my best and we'll see."
Radwanska, who is through to a grand slam final for the first time, will become the new world number one if she wins the title. If she loses, she will climb from third to second place in the rankings.
"Everyone dreams when they are a kid about becoming number one," she said, "so I'm very happy to have a chance to play for the top ranking.
"But there is still one very tough match to go.
"Of course, I will do everything in my power to perform well and win, but it's not going to be easy.
"I'm really happy that I've been able to improve my ranking so much this year. I think this is the best two weeks of my career, playing my first grand slam final and achieving a career-high ranking no matter the outcome tomorrow."