Following Lionel Messi's controversial doping tests earlier this week, it was now Cristiano Ronaldo's time to get tested.
Read: Messi So Good, He Is Double-Checked For Doping
The Portugese was one of 10 first-team players, which were tested as Real Madrid received a surprise visit from the 'UEFA vampires'.
It is not confirmed whether any of the players had to give urine and blood samples like Messi, but ten Los Blancos players underwent a series of anti-doping tests.
It's the second time this season that Carlo Ancelotti's men passed UEFA controls after they had already been tested before the final of European Super Cup against Sevilla.
UEFA and Spain's Anti-Doping agency are both in charge of anti-doping tests of professional footballers.
Ronaldo and Real Madrid face Almeria in their final La Liga of the year tonight before jetting off to Morocco for the FIFA Club World Cup.
Read: Ronaldo Already Better Than 27 Top Scorers
Los Blancos are currently leading La Liga by two points ahead of Barcelona and on a winning streak of 19 consecutive games in all competitions.
Do you think Ronaldo and Real Madrid will continue their record run tonight? Have your say in the comment section below.