Career
He made it into the top 100 for the first time in 2006, and reached a career-high singles ranking of World Number. 35 in July 2009.
Kunitsyn is arguably best known for two matches against compatriot Marat Safin. The first of which was at the 2007 Tennis Channel Open"s round robin stage.
While serving for the match, Kunitsyn broke Safin and then held to get it to 5–5.
Kunitsyn performed the same as before, and broke Safin again to get the set on equal terms. The pair met again in the final of the Kremlin Cup, an Association of Tennis Professionals tournament played in Moscow, which is to date Kunitsyn"s only tour final and was Safin"s last appearance in an Association of Tennis Professionals final before his retirement in 2010.
1, 7–6, 6–7, 6–3 for his first and, to date, only professional title. In August 2008, he made the semifinals of the Legg Mason Tennis Classic, beating Mischa Zverev, Fabio Fognini, and Somdev Devvarman, before losing to Serbia"s Viktor Troicki.
In June 2009 he lost to Israeli Dudi Sela, at "s-Hertogenbosch in the Netherlands in a grass-court tuneup for Wimbledon.
In Wimbledon, he lost to Andy Roddick in the second round in four sets, winning the third set. At the 2009 Indianapolis Tennis Championships in July, Kunistyn was beaten in the second round by 23-year-old American Wayne Odesnik. In Wimbledon 2012, he lost to Go Soeda in the first round match.
Singles: 13 (7–6)
Doubles: 8 (4–4).