Çağla Büyükakçay (; born 28 September 1989) is a Turkish professional tennis player. She has won 12 singles and 15 doubles titles on the ITF Women's Circuit. In September 2016, she reached her highest singles ranking of world No. 60. She won her first title on the WTA Tour at her home tournament in Istanbul. On 29 February 2016, she peaked at world No. 111 in the WTA doubles rankings. Playing for Turkey at the Billie Jean King Cup, Büyükakçay has a win–loss record of 39–30. She is also the top-ranked tennis player at Istanbul's multi-sports club Enkaspor. Büyükakçay was the first tennis player to represent Turkey at the Olympic Games. She competed at the 2016 Rio Olympics . Career She did not contest many junior tournaments, only playing four before competing at the senior level. After a few aborted starts, Büyükakçay played her first professional match at an ITF event in Istanbul in May 2004. Losing in the qualifying draw, she would play two more tournaments during the 2004 season. She won her first ever Fed Cup match in 2005, partnering Pemra Özgen to defeat Stephanie Pace and Stephanie Sullivan of Malta. She made her WTA debut at the İstanbul Cup, but lost to Elena Vesnina in the first round. She continued to compete in 10k and 25k events for the remainder of the year. Büyükakçay began the 2006 season in Ramat HaSharon, but fell there in qualifying to Katariina Tuohimaa. She did not win a main-draw match until April, when she made it to the second round of a $10k tournament in Chennai. She again played for Turkey in Fed Cup, registering a straight-sets win over Olfa Dhaoui of Tunisia. She partnered again with Pemra Özgen, this time double bageling Sigurlaug Sigurdardottir and Iris Staub of Iceland. She reached her first singles and doubles finals simultaneously in Antalya, losing the singles final but winning the doubles with Alena Bayarchyk. She continued mainly on the ITF Circuit but would not reach another final until September, when she made it to the final of in Istanbul. Büyükakçay continued to gain experience during the 2007 season, recording her first ever singles title in Istanbul. In 2008, Büyükakçay won her second singles title in Gaziantep. She proceeded to enter a mix of lower and higher-level ITF tournaments with some success, including a quarterfinal appearance at a $50k tournament in Penza, going down