This one left me a bit flat. I'm not much of a sport junkie, though I do follow some professional cycling. And surprisingly, the plausability issues didn't bug me, and I'm usually a stickler for that.
Two main problems for me, both character-related:
There was something about the relationship between the narrator and the robot that didn't click. Partially, the narrator took being displaced as center with barely a ripple of discontent. All well and good to be a team player, but this guy was just too good to be true, at least from my vantage point. Perhaps because of that, the outburst at the end seemed almost contrived. Partially, there "just didn't seem to be any there, there" in terms of the relationship. I suppose that's understandable when dealing with a machine, but they kept talking like there was.
The robot's emotions also seemed implausible to me. It was like it was watching itself have emotions, rather than actually experiencing them. Despite all the jabbering about it, it didn't sound like it was experiencing the "agony of defeat"; more like it was watching someone else.
In the face of all that detachment, I guess I was pretty detatched, too.