He fought Young Maestro in Incredible Hulk #439-#440.
Anyway, @isaac_clarke and @darkraiden... Look at this fight, this is Shrapnel Hulk after becoming Young Maestro fighting Warrior's Madness Thor actually giving him a good fight. And as you know Warrior's Madness is 10x stronger than regular Thor... he even took a lightning from a bloodlusted Thor and shrug it off. If Hulk climbing Mount Olympus isn't enough, this should be enough to show you that Thor shouldn't be able to simply one shot Hulk.
I've seen it. Thor was weak right before it, before this fight he also states he ALWAYS holds back on Hulk, and there was a lot of PIS like Cold and a hard hit hurting Thor, and Thor and Hulk being worried about a mere bomb. Oh and Hulk was "the maddest he's ever been" Not really good for either of them.