Only thing I would really comment on is the crop. Mainly the arm on the left edge of the frame, easy thing to crop past.
and the runner in the back is decapitated. Either needs to be out of focus a little bit more to be less of a distraction. Or needs to be fully in the frame.

other then that, it's a unique and funny moment which is captured quite well. Just... not sure how happy athletes are to have pics with these expressions on them in your portfolio.

I wouldn't look at such a portfolio and go "yes, I want him to photograph me at my next race"

perhaps it could work as a little fun "extra" series with "the expressions of the athletes". But I perhaps wouldn't put it in a sport photography portfolio