Question: Between Andrei Olhovskiy and Jelena Janković, who became a pro earlier?

Context paragraphs:
2008 Wimbledon Championships – Mixed Doubles: Jamie Murray and Jelena Janković were the defending champions, but Janković chose not to participate, and only Murray competed that year.

1997 Kremlin Cup – Men's Doubles: Rick Leach and Andrei Olhovskiy were the defending champions, but Olhovskiy did not participate this year.  Leach partnered Jonathan Stark, losing in the first round.

2014 Rogers Cup – Women's Doubles: Jelena Janković and Katarina Srebotnik were the defending champions, but they chose not to compete together.  Janković played alongside Klára Koukalová, but lost in the second round to Michaëlla Krajicek and Barbora Záhlavová-Strýcová.  Srebotnik teamed up with Květa Peschke, but lost in the second round to Chan Hao-ching and Chan Yung-jan. <br>

Ivanovic–Janković rivalry: Serbian tennis players Ana Ivanovic and Jelena Janković are both former world No. 1 and have met 12 times so far.  Their overall head-to-head series is 9–3, in Ivanovic's favor.  Janković is two years older than Ivanovic, so their paths connect them to play each other.  They are the first female players to achieve major successes for independent Serbia.

Jelena Janković career statistics: This is a list of the main career statistics of Serbian professional tennis player and former World No. 1, Jelena Janković.  To date, Janković has won 15 WTA singles titles including four WTA Tier I singles titles, one WTA Premier Mandatory singles title and one WTA Premier 5 singles title.  Janković was also the runner-up in singles at the 2008 US Open, a semi-finalist at the year-ending WTA Tour Championships in 2008, 2009 and 2013 and a quarterfinalist at the 2008 Beijing Olympics.

1996 du Maurier Open – Men's Doubles: Yevgeny Kafelnikov and Andrei Olhovskiy were the defending champions but only Olhovskiy competed that year with Ken Flach.

Andrei Olhovskiy: Andrei Stanislavovich Olhovskiy (Russian: Андрей Станиславович Ольховский ) (born 15 April 1966) is a former tennis player from Russia, who turned professional in 1989.

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.

1996 Indonesia Open – Doubles: David Adams and Andrei Olhovskiy were the defending champions but only Olhovskiy competed that year with Patrick Galbraith.

1997 St. Petersburg Open – Doubles: Yevgeny Kafelnikov and Andrei Olhovskiy were the defending champions but only Olhovskiy competed that year with Brett Steven.

Supporting paragraphs: Jelena Janković Andrei Olhovskiy
Answer: Andrei Stanislavovich Olhovskiy