Kate Upton doesn't have sex with fiance Justin Verlander before his baseball games because he is too focused on his performance on the field.

Verlander is one of the Detroit Tigers' biggest stars and the model/actress reveals he is adamant about not fooling around prior to a game.

"There's no sex before a game - absolutely none," she told Watch What Happens Live! on Wednesday (22Feb17).

The Other Woman star also revealed they don't get intimate after a good game either, because Verlander is "exhausted".

"What I've just found out is, if he plays too well, there's no sex after, either...," she continued. "It's kind of a buzzkill for me."