Russian billionaire Mikhail Prokhorov is getting closer to selling the Brooklyn Nets, sources told The Post. There are multiple suitors late in the process to buy a 49-percent stake in the struggling NBA team, along with the right to buy a larger stake and become the controlling owner in three years, sources told The Post. The sale does not include Brooklyn’s Barclays Center. Prokhorov is seeking a better than $2 billion valuation for the team, sources said. Reuters reported Thursday that Alibaba executive Joseph Tsai, who is worth nearly $12 billion, was in advanced talks to buy a stake in the Nets.