What is the fine-grained topic of the following text: Pancho explains how to deal with stress based on his experience as an ex tennis professional and Olympic participants, who has also worked with Enrique Iglesias, Al Gore, Kofi Annan, Sting and Andre Agassi amongst many other top athletes, legendary artists and world leaders. Only return the topic.
Dealing with stress from the perspective of an ex-tennis professional and consultant to top athletes, artists, and world leaders.