Original sentence: Kendrick has been called a "serve and volley" player by some.Kendrick's main strengths are his serve and his forehand
Edited sentence: He occasionally shows signs of promise by winning matches at ATP tournaments, but then retreats into full obscurity as he goes months before winning his next ATP match.His ability to volley the ball at the net is mediocre.Kendrick has been called a "serve and volley" player by some, but his main strengths are his serve and his forehand.Kendrick's opponents typically succeed by trying to exploit his weak backhand and slow footwork.Kendrick's pro career has been a disappointment to some who think that he has not been able to maximize his potential.Pundits have offered various explanations for Kendrick's inability to achieve greater success as a professional tennis player.Some say that he simply lacks the requisite talent to enter the elite ranks of professional tennis.These people concede that Kendrick has a formidable serve and forehand, but attribute his mediocrity to deficiencies in other areas of his game (i.weak backhand, slow footwork, and mediocre volleys)