Can someone recommend a competitive teaching pro for a junior pro player in LA area, preferably toward east (Pasadena, Glendale, downtown, etc). Not a merely a hitting partner, not tennis group practices but someone who can take an advance junior USTA player (12- year old, utr 4-5) to the next level for potential high-school/college team. Someone who can work both on technical and playing tactics, etc. Why is this so difficult to find someone in these competitive location? Any thoughts are appreciated.