World number two Aryna Sabalenka started her Miami Open campaign after an emotional week with an impressive win over close friend Paula Badosa.

Two-time Australian Open champion Sabalenka, 25, played her second-round match four days after the death of former partner Konstantin Koltsov.

Koltsov, an ex-ice hockey player, died in Miami aged 42 in what police described as an “apparent suicide”.

Belarusian Sabalenka won 6-4 6-3 against Spain’s Badosa.

They have described themselves as “best friends” on the WTA Tour, and shared a long and warm hug at the net after Sabalenka reached the last 32.

Wearing an all-black kit and a cap pulled down low, Sabalenka looked up to the sky before the pre-match coin toss.

On Wednesday she said her “heart is broken” after Koltsov’s death and described it as “an unthinkable tragedy”.

Her meeting with Badosa was one of the first matches to be completed on Friday after heavy rain disrupted the schedule.

US Open champion Coco Gauff beat Argentine qualifier Nadia Podoroska 6-1 6-2.