The Manchester United striker, who once again inspired his side to a crucial victory in the title race, insisted he was only concerned with winning trophies. 'That's more important,' he said.
He took his tally to 32 with two more in Sunday's 3-0 defeat of Fulham at Old Trafford and Ferguson now believes the 'impossible' is possible.
At the double: Rooney scored a brace as United beat Fulham 3-0 at Old Trafford
'I said a while ago it's impossible for a day,' said United's manager.'But he's on 32, so what can I say? It's a challenge for him.
'He is capable of scoring in the next eight league games and the five European games we could yet have. So with 13 games a possibility, you never know. I wouldn't put it beyond him, although I'm just happy to get over the 30 mark. We're enjoying his form at the moment. He's definitely making a difference to the team.'
After scoring the third of United's goals Dimitar Berbatov declared that Rooney was now the best player in the world.
Closing in: Rooney celebrates his second goal against the Cottagers, and now needs 11 to beat Ronaldo
'I think at the moment he is the best,' said the Bulgarian. 'And he is still so young so he has plenty of chances to become even greater. Like I've told him many times, just stay healthy and you can achieve everything.
Enlarge 'I think Wayne can certainly get over 40 goals this season. He still has plenty of games left so I wish him luck.'
With United two points ahead of both Chelsea and Arsenal - Chelsea have a game in hand - Ferguson predicted it could be the tightest title race in Barclays Premier League history.
'Right now it's looking like it could be the tightest we have seen,'he said. 'We only have eight games left. Chelsea have nine. We are allstill in Europe and Chelsea are still in the FA Cup, so it could bevery tight.'
Ferguson says keeping a settled back fourtogether, after the injury problems that have been endured by RioFerdinand, Gary Neville and Nemanja Vidic, could be key to theirsuccess, as well as their superior goal difference.
'I keeppraying I can keep that back four together,' he said. 'With theexperience they've got and Edwin van der Sar's experience, it wouldgive us a massive chance. The key for us will be keeping them fit.
'We're getting a few injuries and so are Chelsea and Arsenal. But if we can now keep the back four together that would be good. 'You also have to think about goal difference. We're four goals ahead of Chelsea. I wish it was 14 but it's something that's to our advantage.'
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