Analysis of information sources in references of the Wikipedia article "Big Four (tênis)" in Portuguese language version.
Roger Federer v Rafael Nadal. Time span: '04-present (18 matches). Head to head: Nadal 12, Federer 6. Major finals: Six; Nadal leads 4–2. Wimbledon: Three finals, 2006, 2007; 2008; Federer won first two, Nadal won Sunday's epic. After Sunday there can be no doubt these two now rank alongside the great tennis rivalries.
