Lee Hyun-il could meet his compatriot in the final ©Getty Images

An all South Korean men's final between the top two seeds at the Badminton World Federation (BWF) Thailand Masters Grand Prix Gold remains on the cards after the quarter-finals were completed in Bangkok.

Number one seed Lee Hyun-il, a World Championship bronze medallist from 2006, battled into the last four by beating Hong Kong's Wei Nan 21-18, 21-13 at the Nimibutr Stadium.

He will meet Thailand's Tanongsak Saensomboonsuk, the last remaining hope for the home nation, in the semi-finals, after the 25-year-old knocked out another Hong Kong player, Ng Ka Long, 21-23, 21-11, 21-18. 

South Korea's second seed Son Wan-ho, meanwhile, knocked out his compatriot Jeon Hyeok-jin after coming from behind to prevail 11-21, 21-12, 21-11.

 Busanan Ongbumrungpan is one of two home hopes left in the women's tournament
Busanan Ongbumrungpan is one of two home hopes left in the women's tournament ©Getty Images

He will meet Hu Yun of Hong Kong for a place in the final, after he won another three game affair 23-21, 11-21, 21-11 against India's Sameer Verma.

In the women's draw, home fans will be dreaming of an all Thai final after both Ratchanok Intanon and Busanan Ongbumrungpan booked their semi-final spots.

Intanon, the number two seed, beat Nichaon Jindapon 21-14, 21-14 in an all Thai affair while teenager Ongbumrungpan brushed aside Indonesia's Dinar Dyah Ayustine 21-5, 21-18.

The prize for Intanon is a clash with South Korea's Sung Ji-hyun, who ended the hopes of another Thai player, Porntip Buranaprasertsuk, 21-17, 21-10.

Ongbumrungpan, meanwhile, will play China's Sun Yu who knocked out Hong Kong's Yip Pui Yin 21-15, 21-9.

The semi-finals are due to be played in Bangkok tomorrow.