Caroline Wozniacki's second half of the 2015 tennis season brings new meaning to the phrase, "cuts like a knife."

The campaign came to an end for the Danish star after she was forced to retire from her opening match at the Huajin Securities WTA Elite Trophy Zhuhai in China because of a left wrist injury, according to WTATennis.com.

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The 17th-ranked player withdrew during her match against Svetlana Kuznetsova in which Wozniacki trailed 7-5, 2-2.

The wrist injury developed after Wozniacki cut her finger on a bread knife after ordering room service from the hotel she was staying at when she first arrived in Zhuhai, China for the event.

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"I cut it and I put my finger in my mouth to stop the bleeding and ran to my dad," Wozniacki said. "There was blood all over my mouth. I didn't want to get stitches here so it's glued shut."

She had to alter the way she holds the racket because of her cut, and that produced a strain on her wrist that led to her injury.

"I thought I was going to able to play today, but [it] just got worse," Wozniacki told reporters. "When I can't hit my backhand properly that's a problem. I just started feeling a lot of pain.

"So it's been a really, really frustrating, s****y second half of the year. Basically just been falling apart physically with the knee and back and leg and wrist.

"It's sad, because I came here and it's like I'm going to finish off the year strong. To come here and only play half a match is really disappointing."

Wozniacki, who was ranked as high as No. 5 in 2014, finished with a respectable 39-23 record in 2015 -- but it was a disappointment compared to the way she finished the 2014 season when she advanced to the U.S. Open and WTA Finals championship matches.

The 25-year-old said her body is starting to feel the wear and tear of years of competing on the WTA Tour.

"Sometimes it's hard to just say stop and give your body time to heal," Wozniacki said. "I think the older I get the more I need to realize that I can't just go out there and play and do things like that when I'm not 100 percent, because it's just going to [make] things worse.

"It was different when I was younger. Yeah you have a little bit of pain here or there and it would go away like this (snaps fingers). Just doesn't happen anymore. I just think I need to realize that."

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