This is what I saw in a snippet from The Telegraph today and it quotes Rafa:
''A striker is not a priority," he said. "Kuyt and Crouch can score goals. Andrei Voronin is coming from Bayer Leverkusen. We need to improve in other areas. We have targets. I'm not sure about how many, exactly. It depends if we get big offers for other players here. It's not about one player scoring 20 goals. We need more players scoring 10 to 15 each season. What happens if you spend £40 million on one striker and he gets injured?"

RAFA 
Comment