QINGDAO - Chinese badminton star Lin Dan quit his semifinal clash with teammate Chen Jin at the Asian Badminton Championships on Saturday.

According to the organizing committee of the Asia championships, Lin's waist injury recurred during morning's session of training. Lin's withdrawal sent Chen into Sunday's final against Chinese Du Pengyu, the 17-21, 21-16, 21-12 winner over Chen Long in the semifinals.

Chen is currently ranked fifth in the world, but based on points collected during the Olympic period he is at No 4, ahead of Danish veteran Peter Gade. Chen needs to secure the fourth place until the end of April to ensure an Olympic ticket.