The 26-year-old, who is eligible for play for either Spain by birth or Ghana via his parents, confirmed the result after taking a test ahead of the club’s preparations for pre-season.
He admitted he has no symptoms and will undergo the necessary self-isolation measures in a bid to control the spread of the virus.
“Today they confirmed that I have tested positive in the PCR test. I am asymptomatic and I feel fine. It is time to be at home in isolation until I overcome the virus. I really want to join the pre-season,” Williams posted on his Twitter account.
Williams played the entire 38 games during the concluded 2019-20 season, scoring six goals and providing two assists. All his strikes came before the league was suspended in March due to the spread of Covid-19 of which Spain was one of the most affected countries in the world at that time.
Spain has the 11th most infections in the world with 326,000 confirmed cases, 28,500 deaths and 150,000 recoveries.