The Werder Bremen attacker might also have to delay his comeback for the USMNT.
2017 SeasonAll times ET
Borussia Dortmund still need three points to guarantee a place in next season's Champions League after they drew 1-1 at Werder Bremen.
Werder Bremen are prepared to lose Thomas Delaney to the Premier League because the club know it's "his dream" to play in England.
Borussia Dortmund and Werder Bremen are among the Bundesliga clubs backing a lower-league team's battle against Germany's rising far-right hooligans.
United States international Aron Johannsson suffered a ligament injury in training with Werder Breman and is set to miss Friday's game.
Johannsson, 27, spent some of the international break in Iceland, where he was receiving treatment for an Achilles tendon problem.
Lennart Thy will miss a week's training with VVV Venlo and the Dutch side's next league game in order to help a leukemia patient.
Johannsson struck in the 78th minute to secure a point against Gladbach as a substitute.
American forward Aron Johannsson scored the equaliser as Werder Bremen rallied from two goals down to draw 2-2 at Borussia Monchengladbach on Friday.
Defeat in the Nordderby at Bremen's Weserstadion would push Hamburg closer to their first-ever relegation from the Bundesliga.
American striker Josh Sargent has signed his first professional contract at Werder Bremen on the day of his 18th birthday.
Orlando City has acquired Senegal international center-back Lamine Sane from Werder Bremen.
Johannsson, 27, had not started a Bundesliga match since September 2016 until Florian Kohfeldt decided to play him on the wing.
U.S. international Aron Johannsson is set to make his first start for Werder Bremen since September 2016.
Bayern Munich defender Marco Friedl has joined Bundesliga strugglers Werder Bremen on loan until the summer of 2019.
Thomas Muller reached a century of Bundesliga goals as Bayern Munich fought back to beat Werder Bremen 4-2.
Not content with being a professional footballer and a pro-standard poker player, Werder Bremen forward Max Kruse has added a third string to his bow.
American striker Josh Sargent will begin training with Werder Bremen's first team next week, coach Florian Kohfeldt says.