Darren Sammy and John Mooney fined for bad language during Ireland's win at Cricket World Cup

West Indies batsman Darren Sammy and Irish bowler John Mooney have both been fined for using bad language during their opening Cricket World Cup pool match in Nelson.

Ireland won the match by four wickets at Saxton Oval, chasing down the West Indies' 7-304 with 25 balls to spare.

Sammy, who combined with Lendl Simmons in a crucial 154-run sixth-wicket partnership, and Mooney were both fined 30 per cent of their match fees for separate incidents.

Sammy was heard on television screens using inappropriate words after playing a shot in the 34th over, while Mooney swore several times when a fielder dropped a catch in the 45th over.

Both players admitted the offences and accepted the sanction proposed by match referee Chris Broad.

Sammy began his post-match press conference by apologising for the incident.

"I've been handed a breach of the code of conduct for a swear word, so I'd like to apologise to the viewers for that, especially the young kids listening," he said.