Tennis is a sport that can be played on various court surfaces including clay, grass, hard, and carpet courts. It uses different types of balls and dampeners to control the bounce and sound. The standard scoring system involves points, games, sets, and matches, with games scored using terminology like love, 15, 30, 40. There are four major tennis tournaments played annually around the world. The "Big Four" current top male players who have dominated tennis in recent years are Rafael Nadal, Roger Federer, Novak Djokovic, and Andy Murray.