Marin Čilić is a professional tennis player from Croatia, born on September 28, 1988. He turned professional in 2005 and has since become one of the top players in the world. Čilić is known for his powerful serve and strong baseline game, which have contributed to his success on various surfaces. Throughout his career, Čilić has won multiple titles, including the prestigious US Open in 2014. He has also reached the finals of other Grand Slam tournaments, showcasing his talent and consistency. Čilić has represented Croatia in international competitions, including the Davis Cup.