Ljubicic to retire from tennis Ivan Ljubicic, shown during last year's French Open, on Thursday announced he would retire from competitive tennis next month. ZAGREB, Croatia, March 8 (UPI) -- Ivan Ljubicic, who won 10 ATP tournaments and was ranked as high as No. 3 in the world, announced Thursday he will retire from competitive tennis this year. Ljubicic, who turns 33 later this month, said his last ATP tournament will be the Monte Carlo Masters next month. Ljubicic lives in Monte Carlo. He said it wasn't an easy decision to retire, but he plans to stay "involved and contribute in some ways." Ljubicic turned professional in 1998 and reached a career-high No. 3 ranking in May 2006. That was right before his best Grand Slam tournament result, a semifinals appearance at the 2006 French Open. He is currently ranked 40th. He won 10 tournaments, the most recent coming in March 2010 when he won at Indian Hills, Calif. He advanced to two title matches since then, including at Metz, France, last September. He was 10-14 in championship matches. Ljubicic helped Croatia to the Davis Cup title in 2005 and won a bronze medal in doubles at the 2004 Olympics.