It's only makes sense that Tobirama lost this chapter because Madara is a cheater and very lucky. The senju brothers would have owned him if he wasn't lucky enough that they couldn't bring out their full power. He even praised Tobirama for being the fastest in his generation. Goes to show that Tobirama was feared by Madara at some point, and was faster than third raikage after all. Source: (Madara, Chapter 661 pg 13)
You must be registered for see images