Q: In this task you will be given a claim and a perspective. You should determine whether that perspective supports or undermines the claim. If the perspective could possibly convince someone with different view, it is supporting, otherwise it is undermining.
claim: Joe Calzaghe deserves to be recognized as one of the greatest boxers of all time.
 perspective: I disagree.  Four of his five good fights were his oppenents best fights. 
A:
undermine