Former world number one Lindsay Davenport has expressed concerns about a proposal to introduce round-robin matches at some men's events in 2007.

Governing body the ATP has come up with the idea to ensure crowd-pulling players stay in tournaments longer, but Davenport says it could be abused.

"There's (the potential for) a lot of fixing if your friend needs you to win or lose or whatever," she said.

"A lot of things could happen. There are some kinks to be worked out."

She also said she thought players might be less inclined to put in the effort if they knew they could lose a match but avoid elimination.

But she said she could not see a similar situation happening in women's tennis because of the ferocity of the competition.

"That could happen, although women's tennis I don't see it happening because everyone's so neurotic about always winning," she said.

She also refused to quash rumours that she could be on the verge of retiring, having only committed to playing two more tournaments this year, one in Thailand and one in China.

"If I allow myself to think it's the last time somewhere it would be way too emotional for me," said the 30-year-old.

"Like at last year's US Open it most likely could have been my last one, but if I had thought about that while playing I would have been crying and a wreck. "I've always envisioned that I would be playing a match and it'd be like, 'I'm not having fun', and fly home and just feel like this is not going to happen any more. "Now I'm excited about Beijing because I've never been to China but after that I don't know."