Madison Keys and Milos Raonic stopped by the newly re-opened International Spy Museum before the Citi Open action got underway. The two teamed up to complete an interactive undercover mission.

The museum gives visitors the chance to explore the fascinating world of spies and goes beyond what is typically shown in movies.

Keys dropped her D.C. opener to 17-year-old American Hailey Baptiste, and Raonic is set to play on Thursday against Peter Gojowczyk for a spot in the Citi Open's quarterfinal.