After NBA commissioner Adam Silver confirmed Joe Tsai’s deal to buy 49 percent of the Nets, team owner Mikhail Prokhorov said the e-commerce billionaire will be a fantastic partner and a boon for the entire league. “Just we are finishing the deal. I think Joe is a great partner and will help the game and help the NBA,” Prokhorov told The Post after watching his Nets pull out a come-from-behind 103-98 victory Tuesday night over the Wizards at Barclays Center. Brooklyn had seven players in double-figures, led by Rondae Hollis-Jefferson and Caris LeVert with 16 points apiece. Hollis-Jefferson is just 22 years old and LeVert 23, and Prokhorov noted how deep the roster has become. The Nets have won five of their past eight games, and three of the last four, even with guards Jeremy Lin and D’Angelo Russell out.