West Indies captain Darren Sammy won the toss and sent Ireland in to bat in their crucial Group B match at the World Twenty20 in Colombo on Monday.
The winners will join Australia in the Super Eights round, while the losers go home.
Ireland: William Porterfield (capt), Alex Cusack, George Dockrell, Trent Johnston, Nigel Jones, Ed Joyce, Kevin O'Brien, Niall O'Brien, Paul Stirling, Max Sorensen, Gary Wilson
West Indies: Darren Sammy (capt), Darren Bravo, Johnson Charles, Fidel Edwards, Chris Gayle, Kieron Pollard, Sunil Narine, Denesh Ramdin, Ravi Rampaul, Andre Russell, Marlon Samuels
Umpires: Kumar Dharmasena (SRI) and Asad Rauf (PAK)
TV umpire: Simon Taufel (AUS)
Match referee: Ranjan Madugalle (SRI)