The Idea of the movie is so fresh and genuine the plot is extended and unpredictable .. and the script is funny , In some parts it looked a bit loose with only a couple of shaggy scenes like having sex on the court or in the Swedish prison but it's an HBO thing so we shall be used to that by now but As a whole it suits a TV movie form on cable and i do think they mad it perfectly on the time matter speaking. back to the writer Murray Miller he is not that guy with much of achievements apart from 3 Primetime Emmy nominations on Girls and American Dad :D yet i do believe he made a home run by this movie. Honestly, The ending was Fair but not satisfying it was like lets make a balanced final scene between two stars "Andy Samberg and Kit Harington".
As for the cast, they were all amazing.. bringing a real tennis starts like Serena Williams, Chris Evert and McEnroe was nice touch to make the movie look more like a documentary style .. the others like Will Forte, Fred Armisen and of course that leading stars Andy Samberg and Kit Harington were really funny.
So overall, the movie really works, and yeah the huge campaign i'v seen advertising the movie worked magic ... so it was nice watching some new style of comedy with such a cool cast.