Top seeds and home favourites Tanongsak Saensomboonsuk and Ratchanok Intanon both secured victories at the Thailand Open on Wednesday.
Tanongsak booked his place in the third round with a straightforward 21-17, 21-19 victory over Indian Pratul Joshi.
He moves on to face countryoman Suppanyu Avihingsanon for a place in the quarter-finals.
Others to advance on the day included second seed Marc Zwiebler, third seed B. Sai Praneeth and fourth seed Jonatan Christie.
In the women’s draw, Ratchanok booked her place in the second round with a 21-19, 21-18 victory over Rituparna Das.
Second seed Saina Nehwal also advanced, as did third seed Beiwen Zhang and fourth seed Busanan Ongmanrungphan.