Video: Kit Harington and Andy Samberg star in hilarious new HBO mockumentary

There's no love lost between Andy Samberg and Kit Harington in the trailer for a new HBO mockumentary.

Titled 7 Days In Hell, it chronicles the story of a week-long game between fictional tennis players Aaron Williams (Samberg) and Charles Poole (Harington) at the 2004 Wimbledon Championship. It is Game of Thrones star Harington's first new role since being knocked unconscious while filming Spooks: The Greater Good. The duo serve up a comedic masterclass with the help of many familiar faces, such as Serena Williams, Will Forte and John McEnroe. And if this trailer is the baseline for future gags, it should be great. It is set to premiere on July 11. https://www.youtube.com/watch?v=rpsMi3Q2fok