The duo are the top two seeds and will now go head-to-head for the main prize at the Carlos "El Famoso" Hernandez National Sports Palace in El Salvador's capital.

Second seed Zhang remains on track to defend the title as she survived a scare to book a showdown with Li.

After seeing off Canada's Talia Ng 21-19, 21-19, Zhang came up against a plucky Rachel Chan who had already defeated American fourth seed Lauren Lam in the last-16.

The Canadian forced Zhang into a decider before the American prevailed 21-19, 20-22, 21-6.

Top seed Li, a four-time winner of the event, continued her impressive form today as she overcame Mexican Haramara Gaitan 21-19, 21-9 before beating American Iris Wang 21-14, 12-18 to make her sixth continental final.

The top two seeds in the men's singles draw will also meet in the final after Canada's Brian Yang and Guatemala's Kevin Cordon came through three-game battles.

Defending champion and top seed Yang saw off two Brazilian challengers in Donnians Oliveira and Ygor Coelho.

Yang swept aside Oliveira 21-13, 21-12 before coming from a game down to defeat Coelho 17-21, 21-10, 21-8.

Second seed Cordon started the day with a 21-19, 22-20 win over BR Sankeerth of Canada before outlasting Uriel Francisco Canjura Artiga of El Salvador 21-18, 18-21, 21-13.

Competition is due to conclude tomorrow.