Khrystyna Antoniichuk or Antoniychuk (Ukrainian: 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.

[1] 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.

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

This biographical article relating to Ukrainian tennis is a stub.