Radwanska KO'd after torrid travel schedule

Agnieszka Radwanska, a player not known for outbursts on court, had plenty of good reasons to take out her frustrations on her racket in her first-round Olympic match on Saturday.

Fifty-five of them, to be exact - the number of hours it took her to get from Montreal to Rio de Janeiro this week.

She didn't arrive until Wednesday night, leaving far less practice time than she had hoped, and then she got sick, too.