Los Blancos revealed earlier that Luka Modric and Marcelo had gone into quarantine after returning positive test results for the virus.

Having also seen positive cases appear in the basketball team, Madrid-based newspaper Marca reported morning that the club is fearing a full-blown outbreak at its Valdebebas training base.

The first team now has at least seven members of the playing and coaching staff with coronavirus.

Gareth Bale, Marco Asensio, Andriy Lunin and Rodrygo are the latest players to have contracted COVID-19, while Carlo Ancelotti's son and technical assistant Davide was the one coach named on the list.

All will be absent for Madrid's final two matches of 2021 – the visit of Cadiz on Monday (AEDT) and trip to Athletic Bilbao three days later.

However, there also remains the possibility that Madrid's matches are postponed either on medical grounds or due to a lack of players if there are further positive cases confirmed.