New Delhi, Nov. 19 -- Winless after four rounds of the Ranji Trophy, Tamil Nadu (TN) have overhauled their coaching structure, with former left-arm spinner M Venkataramana set to replace M Senthilnathan as head coach for the white-ball leg of the domestic season, as per ESPNcricinfo.

Senthilnathan will still continue for the rest of the Ranji campaign, with the final two rounds scheduled for January after the Vijay Hazare Trophy.

TN currently sit in the lower half of Group A, placed only above Odisha and Nagaland. In the ongoing fifth round, they are battling to secure first-innings points against Uttar Pradesh, with Rinku Singh keeping them under pressure despite Tamil Nadu putting up 455.

They have already suffered outright defeats t...