Tony Parker -- Winning NBA Championship Could Cost him $20 Million

Tony Parker and his fellow San Antonio Spurs are poised to snatch the NBA championship title from the Miami Heat ... but a victory could cost Tony a fortune.

As you know ... the Spurs are up 1-zip in the finals, and the odds are they could win the whole shebang, because let's face it ... the Heat players are a little haggard.

Tony is in the middle of a $20 million lawsuit over the blowout fight between Drake and Chris Brown at W.i.P. Nightclub in NYC. Parker says he suffered lacerations to his cornea when a glass shard from a bottle struck him in the eye.

When Parker filed the suit, he was halfway through a $50 million contract with the Spurs ... and his future seemed uncertain given the eye injury.

Parker is suing the club, claiming it was negligent in not preventing the brewing brawl.

Now here's the problem ... Tony played a fantastic season this year. He could have won MVP if he hadn't sprained his ankle ... and if LeBron James had suddenly retired.

So the $20 million damage claim kind of goes out the window, especially if Tony gets a ring.

Here's the good news -- In a year, he'll sign a new deal, and $20 mil may look like chump change.