New Zealander Parker will have a keen eye on the fight which has the IBF and WBA belts up for grabs. He's eager to line up a fight with either Klitschko or Joshua and would welcome a title unification bout with his WBO belt.
Parker's mind has been swaying backwards and forwards on who might win at Wembley Stadium in London on Sunday (NZ time), in front of a 90,000 crowd.
"Leading up to the fight I was thinking of Joshua and his power but now the more I think about it, I come back to the experience factor of Klitschko," the 25-year-old Parker said on Friday.
