Batting great Sunil Gavaskar lamented a "sad day" after Anil Kumble stepped down as India coach over a rift with captain Virat Kohli, leaving the hot seat vacant once again.

Kumble said Tuesday his position was "untenable" after Kohli questioned his leadership style and told the Indian board he had reservations about the spin legend extending his one-year stay.

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Since Duncan Fletcher left in March 2015, India, currently the world's top Test team, have struggled for stability with Ravi Shastri and Sanjay Bangar both taking on temporary roles before Kumble's reign.

"I have very little knowledge about the differences between Virat and Anil," Gavaskar told NDTV. "But it is a really sad day for Indian cricket.

"India have won everything since the time Anil took over," he added.

"I can't see Anil doing much wrong in one year. Differences (can) happen in any team but see the results."

India suffered a humiliating defeat to Pakistan in the Champions Trophy final on Sunday, but Kumble also helped them reclaim the number-one Test ranking and maintained an unblemished record in five Test series.

 Kumble, 46, had already appeared headed for the exit after the Board of Control for Cricket in India (BCCI) advertised for a new coach last month, although he was an automatic candidate.