At this point I don't see why Serena should bother playing RG, going into a clay slam with one match on the surface at 37 years old is not intelligent. She didn't move well yesterday (which is the norm these days) and it's not surprising the knee is still bothering her. That's twice this has happened to Peterson now in 2 months :hysteric:
Best to rehab it, take a few weeks off and prepare well for Wimbledon.
Back in the day you'd be gutted if Serena was your proposed seed to face in rounds 2 or 3 of a big tournament, now you'd be pretty pleased as there'd be a strong chance of a walkover, mid match retirement or facing a lesser player instead. It's obviously unfortunate, and retirements/walkovers happen a number of times, but it does harm the draw, and it's especially frustrating when you can see it coming a mile off.