I very much doubt you can sue the other party's lawyer for anything. He won case for his client, which is his job. He doesn't have a duty to you beyond his usual ethical responsibilities.
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No, but you can sue the party.
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If I understand your question - You sued tenant for UD in small claims and prevailed. then tenant through his lawyer filed a malicious prosecution case against you in Superior Court.
Whatever happens in small claims is not res judicata (has no effect on) a Superior Court action. Superior Court goes by a different set of rules of evidence and procedure. Small Claims is the peoples court and is very lax on the rules.