Merrick saw his side fail to score in their clash against Central Coast Mariners and feels his youngsters need to be more selfish.

"We created several chances but we didn't pull the trigger and that's the youngsters like Mate Dugandzic and Robbie Kruse, they do a good job there and they create some good opportunities but just dont pull the trigger," Merrick told AAP.

"Their dribbling is good but they've got to learn to shoot and they've got to learn to take responsibility, back themselves and be a bit more selfish."

Merrick said it should be remembered though that these were still youngsters learning their trade.

"I think its just part of the learning process, we forget that one's 20, one's 21, they're both wingers, virtually unknown until we worked on them and they've come good," Merrick added.

"Id just like to see them take their chances more."