Patrik Schick is expected to arrive in Leverkusen on Tuesday or Wednesday to finalise his move to Bayer, according to Bild.
The 24-year-old will sign a five-year contract with the Bundesliga club but after an outbreak of coronavirus in the Czech Republic camp, Schick is currently in quarantine.
He will complete another test on Monday morning and if it returns negative, Schick is likely to arrive in Leverkusen on Tuesday or Wednesday to undergo his medical and complete his transfer.
AS Roma will receive around €25 million.