Rafa Benitez claims the positive attitude of bargain buy Sotirios Kyrgiakos is proving 'contagious' around Melwood.
The Greek international has been one of our star performers since Christmas as the Reds have gone six Premier League games unbeaten.
And Kyrgiakos had Kevin Davies in his pocket during Saturday's 2-0 victory over Bolton - prompting praise from the gaffer.
"What has Sotirios brought? Headers," said Benitez, whose side have now kept five clean sheets in their last six league games.
"He is strong and he likes the challenge. It is something that we needed and right now he is doing well. His attitude has been contagious.
"Kevin Davies is very strong and it is not easy to stop him in the air, so Sotirios did really well. He lost one tooth in the game and that shows how hard it can be."
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