At my local pro shop last night I saw a couple of Sharapova's Prince racquets being strung. They installed an unmarked red colored poly (at least it looked like poly to me, 17g I believe) in the mains and 17g VS in the crosses. Tensions were 60-M/62-C and 59-M/61-C. The shop uses a Prince crank machine. The poly (?) came in a couple of very cool individual plastic, snap shut cases (sort of like very thin Tupperware) that had a small (very small) Babolat etched on it. Quite a few touring pros have racquets strung at this place and another a couple miles up the road, especially this time of year. Not to mention, Maria owns a home nearby. Was it only 2 racquets because they were going to be demo'd either for the string or the racquet? I have no clue.