A fighting maiden ODI century by Charith Asalanka followed by an impressive bowling effort led Sri Lanka to a thrilling four-run win over Australia in the fourth ODI and helped them take an unassailable 3-1 lead in the five-match series at R Premadasa Stadium, here on Tuesday.

Riding on Asalanka's century (110 off 106) Sri Lanka posted a total of 258 all out in 49 overs. On a deck that was assisting the spinners, the hosts then threw 43 overs of spin at Australia and emerged victorious despite some late hiccups in a last-ball thriller.