Michael Kasprowicz took his best haul in one-day cricket as Australia beat Sri Lanka by 40 runs in the fourth match of their series at Colombo's Premadasa Stadium.

Australia has an unassailable 3-1 lead in the series with the last match to be played on Sunday at Colombo's Sinhalese Sports Club.

Man-of-the-match Kasprowicz took 5-45, easily his best in Australian colours, as the tourists bowled out Sri Lanka for 193 in 43.4 overs.

Adam Gilchrist took six catches to equal his own world record for the most catches in a match. It's the third time he's taken six catches - a feat also achieved by England's Alec Stewart.

Chasing 234 to win, Sri Lanka wasted a century to Kumar Sangakkara, losing its last eight wickets for 50 runs.

Sangakkara made 101 off 110 balls - his third ODI century but his first in Sri Lanka.

After losing Sanath Jayasuriya with no score on the board, Sri Lanka fell well behind the run-rate when Jason Gillespie bowled tightly, giving up just one run from his first three overs.

After a settling in period, all hell broke loose in the 14th over when Sangakkara hit three boundaries in a row off Kasprowicz and then added three more off the next over from Ian Harvey.

He reached 50 off 45 balls with 11 fours.

At one stage he so dominated the batting, Marvan Atapattu (19) was stuck on 18 for six overs and the frustration forced him to hit a catch to Michael Bevan off Brad Hogg.

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