Sri Lanka's Mahela Jayawardena, left, is congratulated by teammate Jeewan Mendis. Photo / AP.
Tillakaratne Dilshan hit an unbeaten century and claimed two wickets as Sri Lanka finally looked like a World Cup contender with a 92-run victory over a sloppy Bangladesh on Thursday in a Pool A game.
Dilshan made the most of an early fielding error to fire 22 boundaries en route to a score of 161, his third World Cup century. Sangakkara marked his 400th one-day international with a quick-fire 105 off 76 balls in a 210-run partnership after Sri Lanka won the toss and batted on a placid Melbourne Cricket Ground wicket.
Lahiru Thirimanne (52) was the lone Sri Lankan wicket to fall, but not before raising an attractive half century in a 122-run opening partnership with Dilshan.
"They (Dilshan and Sangakkara) were brilliant," Sri Lanka captain Angelo Mathews said. "They batted us through and Dilshan was amazing."
Lasith Malinga (3-35) used his express pace to bowl Tamim Iqbal for a duck with just the second ball of the chase and Sri Lanka never looked in danger as Bangladesh capitulated for 240.
Sri Lanka, a three-time World Cup finalist, lost its opening match by 98 runs to New Zealand before an unconvincing four-wicket win over tournament newcomer Afghanistan.
"Definitely this was a really important game for us," said Dilshan who was named Player of the Match. "We didn't play 100 percent in the last two games and I think in every department we did well today - batting, bowling fielding.
"I think with this performance, everyone's confidence is high," he said "I think it's a very important win for us going forward."
Soumya Sarkar fired 25 off 15 balls before he edged a ball from Mathews to wicketkeeper Sangakkara and Mominul Haque survived a review for caught behind to start the seventh innings, only to be caught by Mahela Jayawardene at slip off Suranga Lakmal (2-49) for 1 with the next ball.
Opener Animul Haque made a patient 29 before being caught well outside his crease by a direct hit from Mathews at point. Haque was almost out while on 1 in the second innings when Dilshan dropped a seemingly simple catch at mid-off.
Mahmudullah was out for 28, caught by Rangana Herath at fine leg off Thisara Perera.
Shakib Al Hasan (46) and Mushfiqur Rahim shared a 64-run sixth-wicket partnership and were beginning to look comfortable at the crease before Al Hasan was caught by Malinga at long-on to the offspin of Dilshan (2-35).
Rahim (36) was bowled by Lakmal to usher in captain Mashrafe Mortaza, who made just 7 before being stumped off a ball from Dilshan.
"Dilshan and Sangakkara are great players, they showed us today," Mortaza said. "I hope this is our worst game in the tournament."
Shabbir Rahman top scored for Bangladesh with 53 before being caught behind off Malinga, who dismissed Taskin Ahmed with the next ball to end the match.
Seamer Mortaza was dangerous with the new ball early on in the game, but Bangladesh wasn't able to make a breakthrough until the 25th over when Thirimanne lifted a short delivery from Hossain to Taskin Ahmed at third man.
Bangladesh missed opportunities right from the start, when Anamul Haque dropped Thirimanne at third slip off Mortaza with just the fourth ball of the day.
Sangakkara was also lucky to survive a dropped catch on 23 when Ahmed dived but just failed to hold onto a caught-and-bowled chance.
The veteran Sri Lankan had another reprieve while on 60 when he was dropped by Mominul Haque at point. To make matters worse, there was nobody backing up for Haque's throw to the bowler's end and it went through for overthrows
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