Indian shuttler Ajay Jayaram emerged as the lone survivor at the Korea Open after he defeated Hong Kong's Wong Wing Ki Vincent to reach the quarterfinals of the men's singles event even as P V Sindhu bowed out of the Super Series tournament in Seoul today.Dutch Open winner Jayaram prevailed over World No. 30 Vincent 17-21, 21-15 21-15. The World No. 32 Indian will next take on the winner of the match between Sho Sasaki of Japan and Indonesian qualifier Christie Jonatan.Earlier, it was curtains for two-time bronze medalist at the World Championship Sindhu as she went down 16-21 13-21 to Japan's Sayaka Takahashi in women's singles.