How many has Petrova had? I remember talk about how she swapped coaches often..
I think probably though it would be more lower ranked players, lots of the top players seem to find a good match and keep it. or a family member that they don't want to get rid of. Players with consistent coachesJHH, V&S, Hingis, Maria, Amelie,Lindsay has had a few, but doesn't shuffle them unnecessarily often.)
sam from memory has had 7 i think an a couple that have guided her all i can rember is craig,noel,mark,gigi,woodfod(ais, i think),nicole(atm) an thats all i can rember sry =p
that's a lot of coaches that sam has been guided by i think it's best that she actually gets a full-time coach rather than a part-time one I say. that might actually help her get into the Top 10 at some point in her career if she has a full-time coach.