Rocio Restrepo and Maria Rodriguez were the top qualifiers at the South Point Bowling Plaza as they achieved a combined total of 2,758 points and an overall average of 229.5.

Restrepo rolled 1,381 and Rodriguez shot 1,377 as they showed good form going into the last four.

"We started a little slow, but we knew when the lanes started to break down we had a chance to give it a good run," said Restrepo. 

"Maria had a good look and when she started striking, I got loose. 

"We trusted each other's moves and I think that was the reason we did so well."

The four pairs registering the highest scores from the qualification squads all booked a spot in the semi-finals.

South Korea's Hyerin Son and Yeongi Lee followed the Colombians through in second place with a combined score of 2,729.

It continued a good start to the event for the country after Lee Na-young led the singles semi-finals qualifiers yesterday.

Juliana Franco and Clara Guererro were the second Colombian qualifiers in third place with 2,727, two pins behind the Koreans.

Sweden's Josefin Hermansson and Jenny Wagner completed the semi-final line-up in the American city as they ended fourth on 2,706.

Both semi-finals will be held on Thursday (August 29) with the final on the same day. 

Restrepo and Rodriguez will take on Hermansson and Wagner with Son and Lee clashing with Franco and Guererro.

Tomorrow sees the start of the trios competition.