British number ones Ravij Ouseph and Kirsty Gilmour both lost in the first round of the All England Open Badminton Championships in Birmingham.
World number 18 Ouseph, who reached the quarter-finals last year, lost 21-17 21-12 to India's Kidambi Srikanth.
Scot Gilmour, ranked 19 in the world, was beaten 21-17 21-17 by Japan's Akane Yamaguchi.
Mixed doubles pair Chris and Gabby Adcock beat Indonesia's Ronald Alexander and Melati Daeva Oktaviani.
The Adcocks saved set point in winning the first set 22-20 before taking the next 21-12 to go through at the Barclaycard Arena.