Grieving tennis star posted a touching video documenting her relationship with NHL star Konstantin Koltsov just three months before he took his own life.Koltsov, a coach in 's hockey league, died Monday of an apparent suicide after police in Miami confirmed. He was 42 years old. Despite his coaching commitments, he was a near-constant presence at his girlfriend's biggest career moments. His girlfriend, Sabalenka, 25, has confirmed that she will continue to participate in the Miami Open that began on Tuesday. The pair are both natives of .
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