Benitez is planning to make signings over the summer

"A big club always needs to improve and we will try to do that," he said.

"We have made fantastic progress, but every season I want to improve. We can improve a bit more in defence but we also need to get better in attack."

Benitez has been linked with moves for Charlton's Darren Bent and Blackburn's Craig Bellamy, while Fernando Morientes and Djibril Cisse could leave.