United States international midfielder Alfredo Morales has signed for Fortuna Dusseldorf after the club was promoted to the Bundesliga top flight.
Hadergjonaj, 23, has joined on a season-long loan from the Bundesliga 2 side, and Huddersfield have the option to buy him at the end of the season.
Brighton have announced the signing of Austria left-back Markus Suttner from Ingolstadt.
Adelaide United are tight-lipped on speculation a former Bundesliga manager will be the next coach of the A-League club.
Borussia Dortmund overcame a traumatic week to retain fourth place in the Bundesliga by toppling Eintracht Frankfurt 3-1.
Mario Gomez plundered a hat trick inside seven minutes as Wolfsburg saw a remarkable fightback victory over Bayer Leverkusen snatched from their grasp
Borussia Dortmund consolidated third place in the Bundesliga by scraping past relegation-threatened Ingolstadt 1-0 on Friday.
Bayern Munich continued their Bundesliga dominance as they beat Eintracht Frankfurt 3-0 on Saturday.
Robert Lewandowski scored an injury-time equaliser as Bayern Munich salvaged a 1-1 draw away to Hertha Berlin.
Bundesliga leaders Bayern Munich left it late to clinch a 2-0 victory at Ingolstadt on Saturday.
Bayern Munich can't afford any sentiment this time around by going easy on their neighbours, Ingolstadt. If they do they are in trouble.
Bayern Munich were held to a 1-1 draw at home by Schalke as the Bundesliga leaders laboured to another unconvincing display on Saturday.
Bundesliga leaders Bayern Munich produced another uninspired performance but managed to win 2-1 at Werder Bremen.
Leipzig moved back to within two points of Bundesliga leaders Bayern Munich with a comfortable 3-0 win over Eintracht Frankfurt.
Ingolstadt midfielder Alfredo Morales is eyeing a return to the United States national side.
Bottom club Ingolstadt became the first team this season to beat Bundesliga leaders Leipzig with a Roger goal enough for a 1-0 win in Bavaria.
Werder Bremen earned themselves a bit of breathing space near the bottom of the Bundesliga with a 2-1 win over fellow strugglers Ingolstadt.
Maik Walpurgis marked his first game in charge of Ingolstadt with a win as the Bavarians picked up their first victory of the season in Darmstadt.
Ingolstadt has named Bundesliga novice Maik Walpurgis as their new coach.
Michael Henke has been named interim head coach of Ingolstadt following the departure of Markus Kauczinski on Sunday.
Two late goals earned Augsburg a 2-0 victory in a Bavarian derby against Ingolstadt who ended the game with 10 men and still without a win all season.
Bayer Leverkusen were dealt a stunning second-round exit from the DFB Pokal as they fell to third-tier Sportfreunde Lotte on penalties on Tuesday.