Saralee picked up her recurrent back injury, sustained during the Malaysia Open last month, while stretching during training last Friday.

She was dropped from both the mixed doubles and women's doubles and also cancelled a trip to the Swiss Open (March 13-18).

It will also affect her attempt to collect the world ranking points as the six-day event offers points to qualify for the Beijing Olympic Games next year.

"I'm quite upset but at the same time, I don't want to take a risk, " said Saralee, who would take a one-month break.

"I think it is pointless to take part with an injury," said the 27-year-old player, who last year teamed up with Sudket Prapakamol to reach the quarter-finals in the All England event.

Should Saralee make a full recovery by April, she will compete in the Asian Continental Championships in Johor Bahru, Malaysia, where she and Sudket finished the runners-up last year.

Meanwhile, Boonsak Ponsana seems to have a smoother route than the other Thais, after he was drawn to face a qualifier in the men's singles first round in the all-England championships.

Songpon Anukritayawan and Kunchala Vorawichitchaikul take on hosts Robin Middleton

and Liza Parker in the mixed doubles first round while, Duang-Anong Aroonkesorn and Kunchala face tough test against Chinese world No 3 Zhang Yawen and Wei Yili in the women's doubles opener.

Other Thais in the men's doubles and women's singles will have to compete in the qualifying matches.