Mardy Simpson Fish is an American former professional tennis player. He was a hardcourt specialist. He is one of several American tennis players who rose to prominence in the early 2000s.

Fish won six tournaments on the main ATP Tour and reached the final of four Masters Series events: Cincinnati in 2003 and 2010, Indian Wells in 2008, and Montreal in 2011. His best results at Grand Slam tournaments are reaching the quarterfinals of the 2007 Australian Open, the 2008 US Open, and the 2011 Wimbledon Championships. At the 2004 Summer Olympic Games, Fish reached the final in the men's singles, losing to Nicolás Massú.

In April 2011, Fish overtook compatriot Andy Roddick to become the American No. 1 in the ATP rankings, reaching a career-high singles ranking of world No. 7 in August 2011. He then played in the year-end tournament for the only time in his career.He retired after the 2015 US Open.

As part of the 2021 Netflix docuseries Untold: Breaking Point, Fish shared his story about struggling with anxiety and depression.

Mental Health, Tennis, Athlete, Sports, Sports Motivation, Sports Speakers, Anxiety, Depression, Non-Profit, Non-Profit Professionals Philanthropy,