WATCH: Serena Williams tells reporter exactly how it is after he asks her why she wasn't smiling

Serena Williams let reporters in no doubt about how she felt at a recent press conference when a reporter asked her why she wasn’t smiling.

Serena was answering questions after her recent win at the U.S Open where she defeated her sister Venus Williams, putting herself into the semifinals.

Looking a bit tired and fed up reporters probably should have asked what they needed and let the poor woman get out of there, but one reporter did the exact opposite and ended up paying for it.