When a Attorney ignores his clients calls does not represent his client to the best of his ability can client sue?

Yes, a client can potentially sue an attorney for ignoring calls and failing to represent them effectively, as this may constitute malpractice or breach of fiduciary duty. Attorneys are required to provide competent and diligent representation, and neglecting communication can harm a client's case. However, the client must typically prove that the attorney's actions directly resulted in damages to their case to succeed in a lawsuit. It's advisable for clients to consult another attorney to assess the merits of their situation.