Marlon Samuels produced his best batting effort in One-Day Internationals against Australia to lead the West Indies to a six-wicket victory in the fifth match of the Tri-Nation series at Warner Park in St Kitts on Monday.

Set a challenging target after Usman Khawaja's 98 and supporting half-centuries from skipper Steve Smith (74) and George Bailey (55) lifted the visitors to 265 for seven batting first, the enigmatic Samuels stroked 92 to ensure that the target was reached with 20 deliveries to spare.

"It's all about delivering for the team and keeping us in contention in the competition," player-of-the-match Samuels said.

SCORES IN BRIEF

AUSTRALIA: 265 for 7 in 50 overs (Khawaja 98, Smith 74, Bailey 55; Holder 2-44, Brathwaite 2-60, Pollard 2-32)

WEST INDIES: 266 for 6 in 45.4 overs (Charles 48, Fletcher 27, Bravo 39, Samuels 92, Ramdin 29; Coulter-Nile 2-67, Zampa 2-60)

Result: West Indies won by 4 wickets.

Player-of-the-match: Marlon Samuels.