Former world No. 1 Justine Henin has described the recent behavior of Victoria Azarenka and Alexander Bublik as “unacceptable” as she underlines that a player can’t simply walk off the court when he doesn’t feel like playing. Azarenka was down by a set and a break to Linda Fruhvirtova in the Miami third round when she simply walked to the chair umpire and retired the match. After the match, Azarenka issued the statement, in which she opened about the difficult period she had been going through. This week in Monte Carlo, Bublik was 4-3 down to Pablo Carreno Busta in …