Thirimanne’s lovely cover drive takes him to a second ODI century in the career. He reached the speedy three- figure ton hitting 11 boundary and an over boundary facing 107 balls,
Thiramanne was bowled out by pacer Saeed Ajmal.
Pakistani bowlers were on pressure after a hefty partnership of 157 by Sangakkara (67) and Thirimanne (91).
Later, an Umar Gul delivery broke the partnership at 31.5 overs. Gul picked up 2 wickets in his 8 overs spell.
Sri Lanka has scored 226 for the loss of four wickets in 45 overs against Pakistan in the opening match of Asia Cup 2014 at the Khan Shaheb Osman Ali Stadium at Fatullah in Narayanganj on Tuesday.
Earlier, Sri Lanka won the toss and elected to bat first.
Till the filing of this report, Angelo Mathews (23*) and Thisara Perera (6*) were batting.
Sri Lanka was the host for the second edition of the tournament, in 1986; this was the first multi-national cricket series to be held there. Bangladesh was included for the first time. Sri Lanka won the cup in the final beating Pakistan.
The seventh edition took place in Bangladesh for the second time in 2000. In the final, Pakistan beat Sri Lanka and lifted the Asia Cup for the first time.