Fernando Alonso got a knock on his door at 6am this morning, with the McLaren driver opening to a smiling representative of the World Doping Agency.
Doping officers are allowed to turn up without notice at an athlete's house or hotel, with rules obliged to inform the agency of their exact whereabouts, where they happen to be in the world.
Alonso, who testing at Aragon this week with the Toyota LMP1 WEC team, gladly fulfilled his duties and even posted a picture of the impromptu visitor on Instagram.
The two-time world champion is the second F1 driver to be monitored by the doping agency this week, with Romain Grosjean also getting a 6am knock on his door on Monday.
Nothing better than an anti-doping test at 6am to start your day...
— Romain Grosjean (@RGrosjean) February 19, 2018
Fortunately, F1 enjoys a clean record when it comes to doping, and while controls have been scarce in the past few years, they have become more frequent recently, with Red Bull's Daniel Ricciardo revealing that he had been tested in December, on Christmas day!