The war between Tyreek Hill and Crystal Espinal is still raging on ... TMZ Sports has obtained new court docs which show the Chiefs star is fighting with his ex to share custody of their son.
Crystal obtained sole legal custody of her and Hill's child back in February 2018 ... but Hill claims he's had a huge role in his 4-year-old son's life nonetheless.
In the docs -- filed last week -- Hill says even though Crystal was awarded custody in 2018 while she lived in Arizona .