Res sub judice impacts a lawyer's legal strategy by limiting the ability to initiate parallel proceedings or raise the same issue in different courts while a case is ongoing. Lawyers must adjust their tactics by focusing solely on the case at hand, ensuring that all arguments and evidence are presented in the current court. This requires careful management of deadlines, filings, and motions within the ongoing proceedings. Lawyers must avoid taking any actions that could duplicate the case or create conflicting rulings, such as pursuing similar legal actions in other jurisdictions. By staying within the bounds of res sub judice, lawyers can streamline their strategy, focus on timely responses, and ensure that they comply with procedural rules, ultimately promoting a more efficient and legally sound resolution of the case.