Benitez is coming in for criticism following Liverpool's woeful start to the season but Reina insists the players are all 100% behind the boss.
"Benitez has 100 per cent credibility and support among the players. He is a great coach and he knows how to get the best out of his players," said the keeper.
"He has done important things for Liverpool and will continue to do so. When he is under pressure, that's when he brings out the best in himself. He is perfectly capable of turning the situation around at Liverpool.
"The fans know that, for a number of reasons, results are not good now but they will be again. We need a bit of good luck for things to get back to normal: we have had so many players injured – like Torres, Benayoun and Riera."
