Tharanga, Fletcher set up Sylhet's tense win
The openers added 73 before Nurul Hasan's unbeaten 3-ball 11 sealed the chase of 146 with one ball to spare
Scorecard and ball-by-ball details
Comilla made a fast start with Liton Das driving Santokie through the covers and taking Abul Hasan for two boundaries in four balls, including a lofted six over the bowler's head. Comilla then lost three wickets in a space of 16 balls for the addition of just eight runs. Nasir Hossain bowled Imrul Kayes before Taijul Islam removed Liton and Jos Buttler off successive balls. Taijul's double-strike slowed down Comilla and put pressure on the middle order.
Marlon Samuels and Alok Kapali then led Comilla's recovery but their 42-run stand was cut short by a Krishmar Santokie delivery that held up in the pitch slightly. Kapali went through with the shot but was caught at deep midwicket. The left-arm seamer then suckered Mohammad Nabi into playing a big shot, which was well caught by Shuvagoto Hom tearing to his left from deep midwicket. His 2 for 30 was instrumental in keeping Comilla to 145 for 6, despite Samuels' fifty.
Having smashed fifties against Dhaka Dynamites on Saturday, Andre Fletcher and Upul Tharanga carried that form into their second game on Sunday. The West Indies opener struck two sixes and five fours in his 29-ball 36 while Tharanga provided him able support with quick singles and twos. Their calculated attack lasted 8.4 overs before Rashid Khan ran quickly at cover to complete a superb catch to remove Fletcher in the ninth over.
Soon after removing Fletcher, Comilla strengthened their foothold when Nabi trapped Sabbir Rahman lbw for 3 in the 12th over. Replays, however, suggested that the ball would have gone down leg. When Tharanga was run out for 51, courtesy a fine throw from substitute Raqibul Hasan, Sylhet were 102 for 3.
Rashid Khan, one of the hottest young bowlers in limited-overs cricket, conceded 12 runs in his first over. But he hit back, giving away just six runs in his next three overs, including the wicket of Sylhet captain Nasir Hossain off his last ball. Only three runs came off that over - the 17th of the innings - leaving the hosts needing 28 off the last three overs.
Dwayne Bravo was then expected to tighten the screws with his slower balls and wide yorkers. Instead, he began the 18th over with two wides, and dropped a return catch, reprieving Shuvagata Hom on 0. Two balls later, Hom skied one towards deep midwicket, but Imrul Kayes dived and spilled the chance, conceding three runs. Comilla will rue such errors in a tense game, which boiled down to the penultimate ball.
"We were short by 10-15 runs. If Marlon and I didn't get out in that time, we would have at least made 160."
Comilla Victorians captain Mohammad Nabi
Sylhet Sixers captain Nasir Hosain
Mohammad Isam is ESPNcricinfo's Bangladesh correspondent. @isam84