India have "the potential to become the best ever team" in Test cricket, according to head coach Anil Kumble.
The world number ones thrashed England in Mumbai to seal a fifth successive series win and a extend their unbeaten run to 17 matches.
"The team is exceptional in terms of intensity and situational awareness," said Kumble. "Everyone has contributed to success. This team is special."
India's last Test defeat was by Sri Lanka in Galle in August 2015.
They turned that series around to win 2-1 and have gone on to beat South Africa, New Zealand and England at home, as well as winning away in the West Indies.
Still, they are some way short of the record for most consecutive Tests without defeat, the 27 of cricket windies between 1982 and 1984.
Similarly, they would have to win another four series to match the nine straight wins of England between 1884 and 1892 and Australia from 2005 to 2008.
The world number ones thrashed England in Mumbai to seal a fifth successive series win and a extend their unbeaten run to 17 matches.
"The team is exceptional in terms of intensity and situational awareness," said Kumble. "Everyone has contributed to success. This team is special."
India's last Test defeat was by Sri Lanka in Galle in August 2015.
They turned that series around to win 2-1 and have gone on to beat South Africa, New Zealand and England at home, as well as winning away in the West Indies.
Still, they are some way short of the record for most consecutive Tests without defeat, the 27 of cricket windies between 1982 and 1984.
Similarly, they would have to win another four series to match the nine straight wins of England between 1884 and 1892 and Australia from 2005 to 2008.