National high jumper Michelle Sng broke the national record twice on Thursday to win the women's high jump competition at the Philippines Open.

The 27-year-old cleared 1.81m on her first attempt, which was 0.01m higher than the previous national record of 1.80m, set by Sng herself in July 2006.

The English teacher then proceeded to better that mark with a 1.84m jump, which also tied the gold medal-winning effort by Vietnam's Duong Thi Viet Anhat the 2013 SEA Games in Myanmar.

Said Sng, who has battled injuries and returned to the sport only last year after a three-year hiatus: "It was very emotional for me to break the record. I've been chasing it for such a long time and to clear it by 4cm was just incredible."

Sng has been nominated as part of the Republic's track and field contingent to compete at the 2015 SEA Games, which will take place in Singapore from June 5-16.

The new national record, which was set at the San Luis Sports Complex in Laguna, is subject to official ratification by the Singapore Athletic Association.