The winner of Rangers’ Europa League tie with Bayer Leverkusen will face Inter Milan or Getafe in the one-legged quarter-finals.
Rangers trail the German side 3-1 following March’s first leg at Ibrox, which was the last competitive match involving a Scottish side to take place before the coronavirus lockdown.
The second leg will be played behind closed doors on 5 or 6 August.
All remaining matches in this year’s competition will take place in Germany.
Getafe’s last-16 tie with Inter will take place as a one-off match.
Inter, Getafe, Rangers or Leverkusen will meet Wolfsburg, Shakhtar Donetsk, Eintracht Frankfurt or FC Basel in the one-legged semi-finals on 16 or 17 August, with the final on 21 August.
Rangers are scheduled to begin their Scottish Premiership campaign against Aberdeen at Pittodrie on 1 August after the 2019-20 campaign was curtailed because of Covid-19.
Leverkusen resumed their interrupted Bundesliga campaign in May and finished fifth. The new season begins on 21 August.