Khrystyna Antoniichuk

Khrystyna Antoniichuk or Antoniychuk (Христина Антонійчук; born 4 September 1990) is a former professional tennis player from Ukraine. Her highest WTA singles ranking is 163, which she reached on 8 March 2010. Her career-high in doubles is 275, which she achieved on 12 April 2010.

On 12 May 2010, it was announced by the International Tennis Federation that Antoniichuk 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.

Antoniichuk's last appearance on the ITF Circuit was in April 2010.