Chennai Super Kings' skipper Mahendra Singh Dhoni said the batsmen let the team down after a spirited comeback by the bowlers in their Indian Premier League game against Kolkata Knight Riders (KKR) here on Wednesday. Chasing 168, veteran opener Shane Watson struck his second successive fifty to give CSK a perfect start, but the team choked at the back end of the innings and was restricted to 157 for five to suffer its fourth defeat from five matches. Earlier, 'Birthday Boy' Dwayne Bravo bowled a perfect final over to finish with figures of 3/37, while the trio of Sam Curran, Shardul Thakur and Karn Sharma claimed two wickets each as CSK bowled KKR out for 167.