By Sudipto Ganguly MUMBAI, Jan 8 (Reuters) - Indian tennis faces a second major embarrassment in six months after negotiations between the association and disgruntled Davis Cup players failed ahead of their home tie against South Korea next month. Eight top players, excluding Leander Paes, submitted a list of requirements to the All India Tennis Association (AITA) with a veiled threat to snub the regional first round tie in New Delhi from Feb. 1-3 if no action was taken.