Here’s a quote from an article in The Sheboygan Press on Roger Federer.
In 2003, 21-year-old tennis player Roger Federer was the No. 5 seed at the French Open. He was confident, and thought he had a chance to get to the finals.
He was dumped in the first round by Luis Horna of Peru. Federer blames that loss now on a lack of mental toughness.