Except, we all know Ippo hits harder, if only just.
Now, if only he got his ass back in the ring. I can understand building up, but this is taking a long time XD
My prediction: either Sendo loses, or he wins but ruins himself. I remember one scene like 20 or so volumes ago where he told ippo he had to go to the doctor because of problems with his fist.
I think that Sendo's demise, one way or the other, will be the impulse to get Ippo in the ring again.
Cruel I know, I just think it has to be something like THAT, or else Ippo won't return. Alternatively, Kamogawa can die, or Takamura can be forced to retire. It has to be something really traumatic I think.