China's women's tennis stars are making their final preparations for the French Open, and the players know the pressure has never been so intense.

As well as living up to growing national expectations, the Rolland Garros tournament is the first one for which Olympic Ranking Points will be awarded.

"The Olympics is our top priority this year, we're doing everything for it," head coach Jiang Hongwei told Sohu.com.

"We want to collect as many Olympic points as we can, so the French Open is crucially important for us. I am not thinking about breaking records, I just want my players go as far as possible at the tournament because all the matches are important to our Olympic task."

Chinese tennis player Li Na, pictured in this file photo, is ranked world No 18 but heads into the French Open in Paris starting this weekend in poor form. Reuters

Last year was a career year for many of the players as they climbed up the rankings and won Grand Slam titles. But this year has been a let-down, with injuries and a general loss of form striking the camp.

Peng Shuai, the 30th seed at the French Open, is set to pull out of the tournament after spraining her left ankle during a match against Jelena Jankovic in Berlin last week.

The 21-year-old from Hunan has bounced back after a disappointing 2006 following the appointment of Michael Chang as her new coach, so the new injury setback will be a major blow.

It will also affect her new doubles partner Sun Tiantian, one half of the gold medal-winning pair at the Athens Olympics.

"After a couple of back injuries and now an ankle injury, Peng is having a lot of trouble," said Tang Jiaying, an official of Peng's Tianjin Tennis Team.

Peng and Sun stole the limelight by reaching the final in Charleston before losing to compatriots Zheng Jie and Yan Zi in the WTA's first All-Chinese doubles final at a Tier I event.

Paired for the just the second time at a major tournament, the duo proved to be an instant hit, ousting world No 1s Samantha Stosur and Lisa Raymond in the second round and then rallying to beat much-fancied Flavia Pennatta and Gisela Dulko.

They were quickly given the nickname "Tian-Shuai" by Chinese media, meaning "sweet and graceful".

Peng is now in the United States for further treatment and doctors say she needs to rest at least one month, meaning her Wimbledon trip is in doubt.

Lean times for Li Na

World No 18 Li Na, who soared to a personal best ranking of 16 in January, has found it hard to move further up due to abdominal problems.

Widely considered the most talented player in China, the 25-year-old has struggled to live up to high expectations or adapt her game to slow surfaces like that in Paris. She was knocked out in the third round last year and has yet to win a title on clay.

Last year her rivals took to the court with her with trepidation, but her aura has diminished as she has yet to progress beyond the fourth round.

After suffering an early exit in Berlin and quitting the Italian Open due to abdominal problems over the past fortnight, she hopes this week's low-key tournament in Strasbourg will give her a chance to get some much-needed playing time.

"I should play some more matches on the clay and change my tactics a little bit," said Li, who reached the quarterfinals at Wimbledon last year. "I like playing on fast surfaces but as long as the tournament gives me Olympic points, I will be 100 percent focused on it."

"She needs to be tougher, I know she has improved a lot mentally but there is a lot space ahead of her," said Jiang Hongwei.

Doubles pair in trouble

Li's teammates Zheng Jie and Yan Zi, the winners of the Australian Open and Wimbledon doubles last year, have had similar problems after a stellar 2006 season, winning only the Family Circle Cup in Charleston. They lost to Taipei rivals Chan Yung-jan and Chuang Chia-jung three consecutive times and slipped to No 6 and 7 from 3 and 4 in the Doubles Rankings.

Also, Zheng quit the Italian Open due to right ankle problems and lost in the first round of the German Open.

"It's a tough year for us," said Zheng. "We were dark horses last season but now everybody is staring at us and know exactly how we play. I know we have to go through this and have something new in our play."

China ratcheted up the pressure on its female players last month to ensure they are at the top of their game come summer 2008 with the introduction of the Olympic Points System.

First-round exits will not be considered acceptable and as of June this year players who are eliminated early may have to forfeit their prize money.