Karrie Webb stayed patient to win the HSBC Women’s Champions at Tanah Merah by a shot from Chie Arimura.

On what was a thriller of an afternoon, Webb, who had been three behind leaving the 10th green, was home in 33 to add a 69 to earlier scores of 70, 66 and 70.

The 36-year-old Australian predicted on Saturday night that it would be “a battle right to the end” and so it turned out.

Arimura, in spite of her relative inexperience of playing among the LPGA contingent, refused to go away and had a 25-footer at the last to force a play-off.

“It feels great,” said Webb. “It was a bit of an up-and-down day so I feel very happy to be slinking away with a one shot win.

“Chie handled herself really well and was in with a chance all the way. I know she’s won in Japan but today would have been a different feeling. She really toughed it out.”

After nine holes of the final round, it looked like Tseng was going to win for the fifth week in a row as she went out in 31.

Webb recorded birdies at 13 and 14 to take the lead only to take three to get down from short of the 15th green to cut her advantage from two shots to one.

After birdies all round at the short par-4 16th and pars at the 17th, Webb left her 30-foot downhill putt stone dead for the win.

Asked to pin-point what shot had made the difference to her day, Webb opted for the 4-iron she had hit to 12 feet at the 11th.

“I had been frustrated at being three behind after my bogey at the 10th but, by the time I holed my 12-footer, I was only one-shot off the lead and on my way.”