<page_title> Chronological summary of the 2012 Summer Olympics </page_title> <section_title> Day 1: Sat 28 July </section_title> <table> <cell> Gold medalists </cell> <cell> Swimming <col_header> Gold medalists </col_header> <col_header> Sport </col_header> </cell> <cell> Men's 400 metre individual medley <col_header> Gold medalists </col_header> <col_header> Event </col_header> </cell> <cell> Ryan Lochte <col_header> Gold medalists </col_header> <col_header> Competitor(s) </col_header> </cell> <cell> United States <col_header> Gold medalists </col_header> <col_header> NOC </col_header> </cell> </table>
In Swimming, Ryan Lochte of the United States won gold medal at men's 400-metre individual medley.