It wasn't the usual 'hairdryer treatment' this time, but a distinct change in tactics that caused her 48th-ranked opponent, Maria Jose Martinez Sanchez to fall apart.
It's not just me that finds on court coaching at odds with the 'dog-eat-dog' individualistic ethos of tennis. Being mic-ed up in this way also allows coaches and family members of other players to listen in on some pretty valuable outpourings.
I've now got another reason to oppose it: It actually works.