Australian Open Champion Arena saval lenka's participation at the Miami open this week is in doubt after a personal tragedy the world number two's boyfriend Constantin kov has passed away suddenly at the age of 42 kof's demise has been confirmed by the belarussian Hockey Federation the Federation condoled his death and said that colov died suddenly some media reports in Belarus have suggested that cold St died of a detached blood clot kof had competed in the 2002 and 2010 Winter Olympics for Belarus he had also played for the National Hockey League's Pittsburgh Penguins from 2002 to 2006 after ending his professional career in 2016 he took up coaching roles for various teams sabalenka has frequently posted photos of them together on her Instagram account colov had also praised the 25-year-old after she successfully defended her Australian Open Women's title in January for all the latest news download the Von app And subscribe to our YouTube channel