There’s no official sale book bouncing around yet when it comes to the Brooklyn Nets, but already the investment bank Allen & Co. has received several expressions of interest, The Post has learned.

The basketball team owned by billionaire Russian Mikhail Prokhorov hoped to fetch around $2 billion, but we hear one interested party has been trying to box out others in the sale process.

A source told On the Money that Alibaba Executive Vice Chairman Joe Tsai has expressed an interest in the team, though reps for his family office, Blue Pool, deny it.

Reports suggest the Nets want to find a Chinese backer — not surprising given the success of Yao Ming with the Houston Rockets, which are also for sale.