MANCHESTER, England: Sir Alex Ferguson insists Manchester United has the strength in depth to cope after the Old Trafford injury list hit double figures.

Cristiano Ronaldo scored twice as the Premier League champion swept aside out-classed Wigan 4-0 to go top of the table for the first time this season.

But a sixth consecutive league victory came at a price, as Nemanja Vidic, John O'Shea and Louis Saha joined the growing number of the club's walking wounded - which now numbers 12.