By Kelly Connolly
June 05, 2015 at 03:31 PM EDT
John P. Fleenor/HBO

HBO has released the first teaser for its upcoming film 7 Days in Hell, a Christopher Guest-esque mockumentary about an epic (but fictional) seven-day tennis match. 

“Please, end it,” begs a commentator.

Andy Samberg and Kit Harington play the men who left it all on the court—mulletted troublemaker Aaron Williams (Samberg) and dim-witted prodigy Charles Poole (Harington). The film promises a host of celebrity cameos, including Serena Williams and Soledad O’Brien, but the true star of this teaser might be Will Forte’s tennis racket blazer. Unless it’s Harington’s man bun. (It’s the man bun.)

The star-studded cast also includes Karen Gillan, Lena Dunham, Michael Sheen, Mary Steenburgen, Howie Mandel, Fred Armisen, and June Squibb.

7 Days in Hell premieres July 11 on HBO.

John P. Fleenor/HBO