Reader Brian let us know about this oddity during match point of today's opening-round match at Wimbledon today between Kim Clijsters and Jelena Jankovic, in which a voice on ESPN asks "Why don't you go fuck Josh out there?" in hushed tones.
Update (5:54 p.m.): As many people pointed out, it appears the voice is saying "Why don't you go for the drop shot there," so feel free to ignore the rest of this analysis.
We don't know who Josh is, and for that matter we don't know whose voice it is asking the question (or to whom). A bit of audio forensics suggests it may be analyst Pam Shriver, who in the past has gotten into trouble with what she's said on-air.
There was this episode with James Blake, for example, which featured Shriver interrupting a match with her too-loud criticism of Blake. There's also this, this, and this. Our own John Koblin talked with Shriver last year, and she provided a very telling comment: