About five minutes in, while the four are talking at the net, Higgins - of all people - clearly mispronounces Wimbledon as "WimbleTon".
When the supposed rising star in ladies tennis practices against a service cannon it is obvious almost all her return shots would be called 'out' as she is an abysmal player.
It's been noted that Kim Richards lied about being able to play tennis. This is most obvious in the opening scene when she's practicing. Both her forehand and backhand strokes are not those of a professional, and the ball sales all the way out of the court on her backhand. Not to mention that her footwork is completely off for a supposed "professional."