Zinedine Zidane is in isolation after a member of his entourage tested positive for COVID-19.
The Real Madrid boss has undergone a PCR test and is awaiting the results, but has tested negative in an antigen test.
Zidane missed training with the first team on Thursday as his side prepare for a La Liga clash against Osasuna on Saturday, and it remains unclear whether or not he will be able to travel with the team for the game.
According to La Liga protocol, anyone who self-isolates due to COVID-19 must return two negative tests before they can travel. Zidane has been tested so far and is awaiting the results of it, but if it is negative he will have to return another negative result to travel to Pamplona.
Zidane may miss the next two games due to the isolation period, which would see him miss the Super Cup final against Athletic Club Bilbao midweek as well as the trip to Osasuna.
Zizou has had a tough season so far, with the legendary midfielder breaking out of the sack after breaking through his Champions League squad on the final matchday with a win over Borussia Moenchengladbach.
Since then, Madrid have won five of their last six matches, including against local rivals Atletico Madrid, to move just two points behind them atop La Liga.
The Spanish giants have been hit by the coronavirus on multiple occasions this season, with Eden Hazard, Casemiro, Luka Jovic and Eder Militao all having tested positive so far in the current campaign. Each player has recovered without a problem since then and is back in training with the first team.
The game against Osasuna has another obstacle in its path, with a snowstorm that could cast doubt on this game and many others throughout the weekend.