Simona started her career playing in Junior Australian Open and got the first victory at Trofeo Bonfiglio. She won Roland Garros Junior Championship and continues playing ITF tournament. After the glorious victory over ITF tournament, she entered the semifinals of ITF in 2009 and ranked her place as the world 450 players.
In 2010 she entered the Australian Open but lost several tournaments. Halep got qualified for the French open in 2011 and reached ASB Classic quarterfinals where she suffers failure but got the first victory against top 20 ranked tennis player in the first round. In US Open, she defeated Li Na who was top 10 ranked players and in French open, she reached quarterfinal and ranked in world 47 players.
Halep won two WTA titles on different surfaces and became the first Romanian woman to do so. In 2013, she was awarded as WTA Most Improved Player of the Year and entitled at ESPN Center Court’s Most Improved Player. Simona ended 2014 reaching top 2 players, First Major final & WTA Finals debut and 2015 season as No. 2 position in the WTA ranking and won three titles and also ended 2016 as Second Premier Mandatory title.
Simona was linked in an affair with several boyfriends and one on the list Horia Tecau. The pair was rumored to be dating for a long time and were also rumored to get married some time. Simona currently is dating former Romanian tennis player Radu Barbu.
She earns a handsome amount of salary from her tennis career and is supported by various brands which add up to her recent net worth of over $14 million. In 2017, Simona was ranked No. 10 on the World's Highest Paid Female Athletes by Forbes with total earnings of $ $6.2 million, $4.7 million from salary/winnings and the remaining $1.5 million from endorsements/other sources.
Simona had a total of over $22 million career earnings as of February 2018.
Simona was named honored with the citizen of the city by Constanta municipality and was awarded a 460 square meters property. She also owns a villa in the city worth over $0.68 million.