"We need to regroup and bounce back on Tuesday and make sure we get rid of all the frustration," Martinez said.
"Football can be a cruel game sometimes and we didn't get what we deserved.
"Their 'keeper kept them in the game," Martinez said.
"For 90 minutes we looked like the only team that was going to win, but towards the end Bournemouth had a few breaks that went their way.
"To get nothing out of the games is a big blow, because the performance deserved more than that."