<page_title> Big Four (tennis) </page_title> <section_title> Big Four ATP world No. 1 era </section_title> <table> <cell> Switzerland Roger Federer <col_header> Player </col_header> </cell> <cell> 237 <col_header> Weeks </col_header> </cell> <cell> Spain Rafael Nadal <col_header> Player </col_header> </cell> <cell> 18 August 2008 <col_header> Start date </col_header> </cell> </table>
In August 2008, Nadal passed Federer to become world No. 1, after Federer had been at the top for a record 237 consecutive weeks.