Top Ukrainian junior Yelyzaveta Kotliar said she was "deeply sorry" after her tennis federation criticized the 16-year-old for shaking the hand of a Russian opponent at the Australian Open. Kotliar came under scrutiny at the opening Grand Slam of the year when she congratulated Vlada Mincheva after being beaten in the first round of the girls' tournament. The handshake defied an unwritten rule among her fellow Ukrainians to not congratulate their Russian and Belarusian opponents as war rages in their homeland.