Career
2009 In September 2009 he received wild card access to the main draw of 2009 BCR Open Romania, where he defeated his fellow countryman Victor Crivoi in the first round, but he lost to Spaniard Rubén Ramírez Hidalgo in the second round. 2010 In May 2010, Marius reached his first Association of Tennis Professionals Challenger Tour final at the Trofeo Paolo Corazzi as a qualifier. 2011 The year 2011 started very good for Marius.
He reached his second Challenger final at the Tretorn Serie+ event in Kazan, Russia.
2012 Copil beat world northern 13 Marin Čilić in the first round at the China Open in Beijing.
2015 At "s-Hertogenbosch, Copil defeated Jarkko Nieminen and Guillermo García-López to reach the quarter-finals. At the Australian Open, he recorded the fastest serve at a Slam - 242.0 km/h (1504 mph).
Singles: 5 (2–3) Doubles: 1 (1–0) Singles performances (5–3) Doubles performances (2–1).