CHENNAI, India — In a reprise of the operatic bickering last summer over the Olympics, India’s top tennis players are once again locked in a bitter dispute with the national tennis association.

Eight players banded together last week during the Chennai Open, India’s only top-tier tennis tournament, and sent a letter to the All India Tennis Association demanding personnel and financial changes in the country’s Davis Cup effort before they would agree to play South Korea in February.

An association official responded by saying that any new agreement with the players would have to include a disciplinary code, which enraged the players. Since then, relations have deteriorated further.

Detailed and lengthy letters have become public, with both sides stating that certain demands are nonnegotiable. The players asked for a specific physiotherapist, for all players to be given similar travel arrangements and for the transparent apportionment of prize money. The association agreed to increase the players’ share of the prize money but said its officials would select the team captain and support staff.