Between Andrei Olhovskiy and Jelena Janković, who became a pro earlier?
Jelena Janković Jelena Janković (Serbian Cyrillic: Јелена Јанковић, ] , born 28 February 1985) is a Serbian professional tennis player. Janković is a former World No. 1 in singles, a ranking achieved preceding her finals appearance at the 2008 US Open. Janković's career highlights include winning the 2007 Wimbledon Mixed Doubles title with Jamie Murray, the 2010 Indian Wells Masters, the Internazionali BNL d'Italia twice, in 2007 and 2008, and the aforementioned appearance in the finals of the 2008 US Open. She is coached by her brother Marko.
Elena Vesnina Elena Sergeyevna Vesnina (Russian: Еле́на Серге́евна Веснина́ ] ; born 1 August 1986) is a Russian professional tennis player. Her career-high rankings are world No. 13 in singles and World No. 3 in doubles. Vesnina is a four-time Grand Slam champion in doubles competition, having won the 2013 French Open, 2014 US Open, and 2017 Wimbledon Championship tournaments with Ekaterina Makarova, and the 2016 Australian Open mixed doubles title with Bruno Soares.