Career
On 11 August 2008, he reached his highest Association of Tennis Professionals singles ranking of World Number. 299, whilst his highest doubles ranking of 39 was reached on 22 June 2015. He is the younger brother of Dmitri Sitak, who is also a tennis player.
Junior years
Training in nineties years by Santini, As a 13-year-old in 1999, Sitak received a wildcard into the main draw of an International Tennis Federation junior tournament in Ozerov, Russia where he was defeated by Evgueni Smirnov 6-4 6-1.
Sitak was taken out in the third and final round of qualifying by a future Association of Tennis Professionals top 100 player Teimuraz Gabashvili 6-4 7-5. Sitak made his first junior Grand Slam appearance at the age of 15 at the 2002 Australian Open where he was beaten in straight sets by Australian Christopher Roman.
Sitak"s last junior tournament came a year later at the 2003 Australian Open where he was eliminated by Korean Hyun-Joon Suk in the first round. Senior career
Sitak began his senior career in 2002 at a challenger event in Togliatti, Russia where he received a wildcard into the main draw but fell in the first round to Thomas Blake, older brother of former top 10 player James Blake.
Artem"s first title came in 2005 in a Russian futures tournament where he defeated Pavel Chekhov 4-6 6-4 6-4 in the final.
2011
Sitak began 2011 under the New Zealand flag and received a wildcard into the 2011 Heineken Open qualifying where he was defeated by Frenchman Ludovic Walter 6-3 6-4 in the first round. 2014 First Association of Tennis Professionals Doubles title
Defeating Philipp Oswald and Guillermo Garcia-Lopez 2-6 6-1 (10-7) in the final. Singles: 5 (5–0)
Doubles finals: 40 (23–17).