Veteran Sugiyama, playing in her 60th Grand Slam (!) put up a brave fight on centre court against Jelena Jankovic before losing 4-6, 4-6.
Sugiyama said the heat affected her, but doesn't know why as she usually handles it well.
Asked if she was happy with her performance, she said: "Yes and no."
"My expectation was a little bit higher. I don't know why but I couldn't breathe properly today, somehow it was very shallow and I had cramping towards the end."
"It's strange because normally I'm good at playing in the heat. I usually like it but today I wasn't feeling great."Sugiyama called a medical time-out in the second set, telling officials she was having trouble breathing as trainers placed bags of ice on her legs.
She said she would consult a doctor but believes it was only minor dehydration.
On the men's singles, Rendy who had his biggest win against David Nalbandian on Wednesday, was brought crashing back to earth by Tommy Robredo 6-1, 6-3, 6-2.
Rendy missed the chance to play against Andy Roddick in the fourth round.
Asian hopes now rest with Zheng and Peng.
They play their third round matches today with Zheng Jie having the easier task up against Kateryna Bondarenko.
Peng Shuai will face world no. 2 Serena Williams in a match that I hope will be an upset.
(Via AFP; Images by Franck Robichon/Greg Wood/AFP/Getty Images)