Australian cricket great Ian Chappell feels India losing back-to-back Test series -- in England and against a depleted side Down Under -- would be a "bookable offence".
Former captain Chappell also said the next few months will be a defining period in Virat Kohli's captaincy career.
Prior to reaching the UK, India had a glorious opportunity to defeat two heavyweights in England and Australia in consecutive away Test series. Had they done so, it would have been a laudable achievement," Chappell wrote in 'ESPNcricinfo'.
"Now Kohli's team are in danger of not only wilting tamely against England but also of providing a depleted Australian team with a confidence boost, to the point where they will feel their chances of victory at home have greatly improved.
"If India were to lose both series, it would be a bookable offence."
Arriving in the United Kingdom as the world's number one Test side, India trail the five-match series 0-2 after reverses in Birmingham and London. The No. 1 Test side did put up a decent show in the first day of the third Test match, reaching 307 for six at stumps after being asked to bat first.
"Currently Kohli is fighting a lone hand against a suddenly rampant England attack, and that allows the bowlers the luxury of expending the bulk of their energy in seeking his wicket.
"The next few months will be a defining period in Kohli's captaincy career. He has already shown on many occasions that he's a master batsman; if he can resurrect this Indian team and find a way to thwart Anderson and his English cohorts, then it will go down as an example of masterful leadership," Chappell said.