Mumbai: Under-performers Rohit Sharma and Suresh Raina need to tighten up their batting considerably with the former in need of improving the shot selection and the latter requiring to play the short balls with more conviction, feels former India skipper Dilip Vengsarkar.

The former chief selector hailed the decision of the selectors to anoint Virat Kohli as the new vice-captain under Mahendra Singh Dhoni for the upcoming Asia Cup and felt that the Delhi youngster seemed to be on the course to make the number three Test slot his own.

Expressing disappointment with the Indian team's performance in Australia, where Dhoni's men suffered a 4-0 whitewash in Tests and failed to make it to the finals of the tri-series, Vengsarkar advised the BCCI to make it mandatory for the contracted players to play in the Duleep Trophy.

He was happy that the BCCI's technical committee has started to do something to improve domestic cricket and felt no purpose is served if Duleep Trophy is played at the end of the season, as is the case this time.

According to the former middle-order batsman known for his majestic drives, the sequence should be Irani Cup (between Ranji winners and the rest), Duleep and Ranji.