Career
Zaitcev made his Association of Tennis Professionals main draw debut at the 2015 Kremlin Cup where he received entry to the doubles main draw as a wildcard entrant, partnering Richard Muzaev.
Zaitcev made his Association of Tennis Professionals main draw debut at the 2015 Kremlin Cup where he received entry to the doubles main draw as a wildcard entrant, partnering Richard Muzaev.
Zaitcev has a career high Association of Tennis Professionals singles ranking of 296 achieved on 24 November 2014. He also has a career high Association of Tennis Professionals doubles ranking of 232 achieved on 20 July 2015. He has won five International Tennis Federation singles titles and seven International Tennis Federation doubles titles.