maybe clogg his hands with something, a la Zaki style.
Robin could probably place her hands over him to take the attack and create an openning for an hit.

it's a question of how the ability works, does he need to create the inital wind for the blast with a pyshical movement, or is it genrated from a 'zero-movement' position?

Actually, Like i said before, I can see Zoro winning this one. all he needs is to learn Mihawks trick of air deflection, even a primitive verse of it could be stop the attacks and make it a fair fight. think about it, how far away (skillwise level) is zoro from creating wind with his slash? it can't be very far, and Zoro always levels up during fights.