The thing with the Hulk is, the longer he fights, the angrier he gets the stronger he gets. He's got no theoretical ceiling limit to how strong he can get. However. He can face opponents that are stronger than him and get knocked out before he reaches a state strong enough to rival or surpass his opponent. So the question here is, can Goku dish out enough punishment to knock Hulk out before he reaches a state that can rival Goku? That's hard to say. Goku is a sportsman and the Hulk is the opposite of him in almost every way. If Goku was doing his usual good sportsmanship which he always does, then it would give time for Hulk to increase in strength. I know that Goku has a wide range of abilities over the Hulk's basic brute strength but by now we've seen that Hulk is resistant to a hell of a lot of forms of damage and energy based damage. Personally, I think if Goku was playing nice then it would be a fatal mistake on his part and Hulk would eventually rage hard enough to reach a level of power to fight Goku.