witnesses

Assalam-o-Alekum Dear sir mera sawal yee hay ka first class civil suit in the court of ist senior civil judge kay pass pending hay defendant side chal rahee hay defendant nay list of witnesses main defendant no. 1 ko witness kia hay defendant no. 3 us ka attorney bhi hay mukhalif advocate nay etraz uthaya hay defedant no. 1 ka moqeef attorney kay zariyee aagaya lihaza defendant no. 1 wittnes nay hosakta .plz sir koee law batein?