The current No . 4 underwent right shoulder surgery five years ago and there were fears her career might be over . Maria Sanchez announced Erik Groeneveld as her new head coach . Sharapova has been without a coach since a brief spell with Jimmy Connors . Groeneveld has worked with the likes of Ana ##ity , Caroline Wozniacki and Andy Murray . Sharapova has n't played since August because of a recurring back injury .
Maria Sanchez announced Erik Groeneveld as her new head coach . Sharapova has been without a coach since a brief spell with Jimmy Connors . Groeneveld has worked with the likes of Ana ##ity , Caroline Wozniacki and Andy Murray . Sharapova has n't played since August because of a recurring back injury .