Kristina Antoniychuk, (Ukrainian: ???????? ??????????) (born 4 September 1990) is a professional Ukrainian tennis player.
Her highest WTA singles ranking is 172, which she reached on 22 February 2010.
Her career high in doubles is 279, which she reached on 9 November 2009.On 12 May 2010 it was announced by the International Tennis Federation that Antoniychuk had committed a doping offence, and was suspended from participation in WTA and ITF events until 21 April 2011 after her sample was found to contain the diuretic furosemide.