<page_title> List of most-watched television broadcasts </page_title> <section_title> List </section_title> <table> <cell> Muhammad Ali vs. Joe Frazier III: Thrilla in Manila <col_header> Television broadcast(s) </col_header> </cell> <cell> 1 <col_header> Estimated audience (billions) </col_header> </cell> </table>
The Thrilla in Manila had 1 billion viewers.