The Portuguese national squad took to the field in Bissen on Saturday morning for their pre-match training.
Luxembourg will face European champions Portugal in the Euro 2020 qualifiers at 3pm on Sunday. It will be Luxembourg's last game of the campaign.
After concerns were aired regarding the poor conditions at the Josy Barthel Stadium, both teams were forced to seek other premises for the pre-game preparations. UEFA took this decision to allow the pitch time to recover ahead of the game on Sunday.
Ronaldo and his teammates made use of the facilities in Bissen on Saturday morning. Although the training session was not open to the public, members of the press were allowed to observe the first 15 minutes.
The Red Lions had their pre-game training session on Saturday afternoon in Beggen.