Manchester United boss Sir Alex Ferguson has no doubts Robin van Persie's goalscoring form will return.

Van Persie's barren spell in front of goal for United extended to nine games with failures at Sunderland - when the winner was credited to Titus Bramble - and Chelsea.

"Robin doesn't need a rest that's for sure," said Ferguson.

"He is a strong lad with a great physique.

"It's disappointing that he wasn't awarded the goal at Sunderland, I can understand that because it took a wicked deflection, because the shot was fantastic.

"All strikers have little dry spells - you always hope it ends quickly. It is just part of being a striker."