MIAMI (AFP) — A traumatic week for world No. 2 Aryna Sabalenka came to an end with a third round, three set loss in the Miami Open to Ukrainian Anhelina Kalinina on Saturday.

The 6-4, 1-6, 6-1 win for the 36th ranked Kalinina prompted Sabalenka, who had kept her emotions in check through both of her games at Hard Rock Stadium, to smash her racket violently into the court.

On Monday, Belarusian Sabalenka's former boyfriend, ex-NHL player Konstantin Koltsov, died in Miami after what police called an "apparent suicide."

The pair had been in a relationship until recently and Sabalenka only announced they were no longer together following the death.

On Friday, she looked in control as she defeated her close friend Paula Badosa of Spain in straight sets.

But given the late slot on the main stadium court, Sabalenka looked to be feeling the strain more as she struggled for any kind of consistency.

After losing the opening set, she utterly dominated Kalinina in the second, with her serve and powerful backhand too much for the Ukrainian.

But once Kalinina broke in the third, Sabalenka's focus and composure deserted her and her opponent took full advantage.

"It's really tough with nerves. But I managed in the tough moments to deal with it," Kalinina said. "So I'm a little bit proud of myself today."

World No. 1 Iga Swiatek had no trouble in beating Italy's Camila Giorgi 6-2, 6-1 as the rain impacted tournament packed in the big names including postponed matches from Friday.

"I was feeling really pretty confident and I just wanted to see how I'm going to feel the surface. It was all really comfortable, so I'm happy," Swiatek said.

Japan's Noami Osaka continued her increasingly impressive form with a 6-2, 7-6 (7/5) win over 17th ranked Elina Svitolina, in a battle of two women who have returned to the tour after giving birth.