Paul Pierce says he's struggling financially after his income reportedly dropped to zero following the end of his payments from Fox Sports .

According to TMZ , the Boston Celtics legend revealed the state of his financial situation in new California court documents as he continues a legal dispute with his ex-girlfriend, Princess Santiago, over child support and legal fees .

Pierce claims he received his final payment from Fox Sports in August, bringing his monthly income down from an average of $119,000 to nothing. His attorney described the former NBA star as "tapped out" and "drowning financially" while having "great difficulty" keeping up with his financial obligations.

However, the court documents reveal that Pierce still has substantial assets and expenses.…