![Marin Cilic, of Croatia, walks to his chair after breaking his racket as he lost a game to Janko Tipsarevic at the Sony Ericsson Open tennis tournament in Key Biscayne, Fla., Saturday, Marin Cilic, of Croatia, walks to his chair after breaking his racket as he lost a game to Janko Tipsarevic at the Sony Ericsson Open tennis tournament in Key Biscayne, Fla., Saturday,](https://c8.alamy.com/comp/2NC2NM1/marin-cilic-of-croatia-walks-to-his-chair-after-breaking-his-racket-as-he-lost-a-game-to-janko-tipsarevic-at-the-sony-ericsson-open-tennis-tournament-in-key-biscayne-fla-saturday-march-26-2011-ap-photoj-pat-carter-2NC2NM1.jpg)
Marin Cilic, of Croatia, walks to his chair after breaking his racket as he lost a game to Janko Tipsarevic at the Sony Ericsson Open tennis tournament in Key Biscayne, Fla., Saturday,
![US Open: Cilic demolishes Federer after Nishikori shocks Djokovic | US Open Tennis 2014 | The Guardian US Open: Cilic demolishes Federer after Nishikori shocks Djokovic | US Open Tennis 2014 | The Guardian](https://i.guim.co.uk/img/static/sys-images/Sport/Pix/pictures/2014/9/7/1410046194610/Marin-Cilic-014.jpg?width=700&quality=85&auto=format&fit=max&s=1d64c76103e49e5c89a28e4438a03970)
US Open: Cilic demolishes Federer after Nishikori shocks Djokovic | US Open Tennis 2014 | The Guardian
![Argentina's David Nalbandian throws his racket as he plays against Croatia's Marin Cilic during their Queen's Club grass court championships final tennis match in London, Sunday, June 17, 2012. (AP Photo/Sang Tan Argentina's David Nalbandian throws his racket as he plays against Croatia's Marin Cilic during their Queen's Club grass court championships final tennis match in London, Sunday, June 17, 2012. (AP Photo/Sang Tan](https://c8.alamy.com/comp/2N9K77N/argentinas-david-nalbandian-throws-his-racket-as-he-plays-against-croatias-marin-cilic-during-their-queens-club-grass-court-championships-final-tennis-match-in-london-sunday-june-17-2012-ap-photosang-tan-2N9K77N.jpg)
Argentina's David Nalbandian throws his racket as he plays against Croatia's Marin Cilic during their Queen's Club grass court championships final tennis match in London, Sunday, June 17, 2012. (AP Photo/Sang Tan
![Marin Cilic, an Unsung Champion, Finds His Rhythm and Reaches the Quarterfinals - The New York Times Marin Cilic, an Unsung Champion, Finds His Rhythm and Reaches the Quarterfinals - The New York Times](https://static01.nyt.com/images/2015/09/07/sports/07openday/07openday-superJumbo.jpg)