The West Indies camp remained wary of the unpredictable nature of the shortest format. "I'm not saying anything bad about Ireland.
But, yeah, I think we're pretty confident," Matthews said.
Matthews highlighted that opposition players could single-handedly shift the momentum of the game.
"We obviously know that they've got some dangerous players, and, in T20 cricket, it takes one or two players to take a game away from you," she said.
The squad focused entirely on their internal strengths rather than external pressures to seal their semi-final spot.
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"But, at the same time, we're just going to back our best brand of cricket and go into that match fearless, knowing that it's all in our hands," Matthews said.