SINGAPORE — Karrie Webb slipped up several weeks ago at the Australian Ladies Masters when she signed an incorrect scorecard and was disqualified. For a moment at the HSBC Women’s Champions on Thursday, she thought she had made a similar mistake.

After shooting a 6-under 66 to take a one-stroke lead in the opening round, Webb feared she may have forgotten to sign her scorecard. She rushed back into the scoring tent only to find her scorecard was just fine.

“I’ve just had trouble getting out of the scorer tent since then,” she said about her mistake in Australia. “I walked out (today) and couldn’t remember if I signed my card, which it would have been too late anyway.”

Sweden’s Caroline Hedwall and American Paula Creamer were tied for second after shooting 5-under 67, a stroke ahead of 2012 champion Angela Stanford and Taiwan’s Teresa Lu in joint fourth.

Disqualification aside, Webb is having a strong start to the season.