Chennai, Sep 10 : Producing a dazzling display, India retained the Asia Cup hockey title, drubbing Asian Games champions Korea 7-2 in the final in Chennai on Sunday. Prabjoth Singh and Rajpal Singh scored two goals each, while Shivendra Singh, who drew first blood in the third minute, S. V. Sunil and Tgnace Tirkey netted one each in the impressive win. Korea managed only two goals, one in the first half through a penalty stroke and the other in the dying minutes.