"For India the big area of concern is bowling. I mean against a better side they can concede 300 plus runs. I know India is good chaser and they will fancy themselves chasing but against better attacks it can be too hard. There bowling has been profligate and I don't see any sign of improvement," Chappell told NDTV during a chat.
"If you have some good spinners who can get some wickets in the middle overs by luring them, like Nathan Lyon does it for Australia. So good spinners can buy you wickets. Good is the operative word here," he said.
Chappell said India's pace attack lacks accuracy and Mahendra Singh Dhoni's men need to sort them out before they start their campaign on February 15.
"I think you need to have five regular bowlers. Shikhar Dhawan is struggling opening the innings and Binny can be brought in as an opener. Technically (Stuart) Binny looks efficient, so he can open the innings. He then makes the extra bowler," Chappell said.
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Former India captain Sunil Gavaskar too backed Chappell and described how the 1985 World Championship winning side used spinners to tame the opponents.
"If we can go back to 1985, the boundaries were right near the fence. We used spinners such as Shastri and Laxman Sivaramakrishnan. So I felt may be a leg-spinner could have been handy. We have similar spinners in Patel and Ashwin, may be a Karn Sharma would have been handy," he said.