By FOX Sports Staff
Manchester United currently command a 12-point lead in the table with 10 games left to play and a 10-goal difference advantage over second-placed Manchester City, but Ferguson insists that his side can do even better in front of goal.
Speaking to Inside United magazine ahead of their 4-0 win over Norwich, he said: "You might be right. Where I think we can improve is that we don't seem to kill teams off.
"We've beaten Wigan 4-0 on two occasions but those are the only matches we've won by that sort of margin [ahead of the Norwich clash]. In a normal season, I'd expect a few more wins by that sort of distance. Last year, we won 5-0 against Wolves, Wigan, Bolton and Fulham, and we beat Arsenal 8-2, of course.
"We're not seeing those results this season, however. We haven't hit those heights. Hopefully, there's more to come and we'll discover that killer instinct that our teams in the past have had."
United lost the title last season to City in the last fixture of the campaign.