Pacer Hasan Mahmud became the first Bangladesh bowler to take a five-wicket haul in a Test match on Indian soil and rattled India's batting lineup in the first innings of the first Test in Chennai.

A series sweep against Bangladesh will cement India's place atop the World Test Championship (WTC) standings but the team under Rohit Sharma are guarding against any complacency in the two-match home series beginning in Chennai on Thursday.

Bangladesh fast bowler Hasan Mahmud rattled India with four wickets to leave the hosts on 176-6 at tea on the first day of the first Test at Chennai on Thursday.Mahmud ripped through the Indian top order including skipper Rohit Sharma and Virat Kohli -- both scoring just six runs -- to leave the hosts teetering at 34-3 inside the first hour of play.