Your combination of flash & the court lighting gives it the unsightly bright reflection. And even though ur pic is small, can already see it is a bit blur. Expected if i presume correctly u shot without support.
I would try for another angle, if possible to eliminate the reflection to as minimal as possible. Use support & dun use flash too.
I like the inclusion of the tree at the background. If I could, I'd try backing off and reshoot in either landscape or portrait in WA to include only the basketball board thingy (sorry, can't remember wat it's called at the moment, :sweat: ) and the tree.
Should get something like a yellow-cast stand & tree side-by-side, with the backgroud utterly black. Worth a look, i think.