Congress sources said Azad has left for Chennai from Mumbai and would hold talks with Karunanidhi amid indications that the party could settle for around 60 seats for the elections scheduled for April 13.
Congress had began the negotiations with a demand of 80 plus out of the 234 seats in the state.
The two parties are now finalising the seat sharing at breakneck speed after yesterday's announcement of the election schedule and rival AIADMK having formalised its tie-ups.
There are only 17 days left for the filing of nominations to begin and the poll schedule announced by the Election Commission has given parties lesser time for campaigning as compared to earlier elections.
The DMK has completed the seat sharing exercise with minor allies like PMK, Viduthalai Chiruthaigal Katchi, IUML and Movendar Munnetra Kazhagam.