John Mulaney and Olivia Munn celebrated the comedian’s 43rd birthday by watching Coco Gauff’s tense match against Ajla Tomljanovic at the US Open—and they were serving up the most hilarious reactions.

Olivia Munn shared the video, which was captured just before she was "wheeled in" for her double mastectomy, in honor of World Breast Cancer Research Day on Monday, Aug. 18.