<page_title> Federer–Roddick rivalry </page_title> <section_title> Career evolution </section_title> <table> <cell> Federer <col_header> Age (end of season) </col_header> <col_header> Switzerland Federer's season </col_header> <col_header> United States Roddick's season </col_header> </cell> <cell> 237 <col_header> 27 </col_header> <col_header> 2008 </col_header> <col_header> 2009 </col_header> </cell> </table>
Federer supplanted Roddick as No. 1 to begin his record reign of 237 weeks at 1.