The record-German league champions salvaged a slender 1-0 win over Eintracht Frankfurt in the Bundesliga clash on Saturday.
Rangers have been boosted by the news that Norwegian superstar Erling Haaland is an injury doubt for the last 16.
Borussia Dortmund are now nine points adrift of the leaders Bayern Munich, with a five-point lead over third-placed Leverkusen.
The United States left-back is likely to make his debut in Bundesliga for Arminia Bielefeld against Borussia Mönchengladbach on Saturday.
The Iranian forward joins the Bundesliga club after spending nearly three seasons with Zenit Saint Petersburg.
The Polish forward set the record for most goals scored in Bundesliga by scoring 41 goals in the 2020-21 season.
The Norwegian became the fastest player to reach 50 goals in Bundesliga history for Borussia Dortmund and is hungry for more.
Bayern Leverkusen sporting director believes that Schick is in the world-class category of footballers.
Jurgen Klinsmann mentioned that hunger was something both Erling Haaland and Robert Lewandowski had in abundance.
The club has asked its fans to come up with suggestions for its jerseys in crocheted, painted, 3D animated or with potato print.