Schalke have clinched the signing of attacking midfielder Kevin-Prince Boateng from Milan on a four-year deal.
Boateng joined Milan on a permanent basis in 2011 having initially moved to San Siro on loan from Genoa in 2010 following his transfer from Portsmouth.
The German-born Ghana international scored twice in Wednesday's UEFA Champions League play-off tie against PSV Eindhoven as the Serie A club booked their place in the group stages with a 4-1 aggregate victory.
Schalke have endured a difficult start to the new season, taking just one point from their opening three Bundesliga games, with striker Klaas-Jan Huntelaar sidelined in the 4-0 defeat to Wolfsburg on August 17.
Boateng's arrival will help boost their forward line and the 26-year-old, who has previously enjoyed spells with Hertha Berlin and Borussia Dortmund, was delighted to secure a return to Germany.
"I'm happy to be back home in Germany in the best league in the world," Boateng said.
"The first contact was made a year ago but sometimes you have to wait a bit longer for the good things and opportunities."
Boateng becomes Schalke's sixth signing of the transfer window after left-back Dennis Aogo joined on loan from Hamburg on Thursday.
Manager Jens Keller is confident that Boateng's arrival will have a big impact and revealed that he could feature in Saturday's clash with Bayer Leverkusen.
"He has collected a lot of international experience and I am sure he will help our team greatly," Keller commented.
"He can be used (against Leverkusen), I have an idea of how to use him tomorrow (Saturday)."
|Chelsea 1 Norwich City 1 (aet, 5-3 pens): Hazard and Caballero seal Blues progression|
|No generosity from Neymar as Cavani waits to make PSG history|
|Neymar sets Ligue 1 landmark with staggering individual display|
|Espanyol 1 Barcelona 0: Melendo ends unbeaten run|
|Paris Saint-Germain 8 Dijon 0: Neymar hits four as Cavani levels Ibrahimovic record|
|Atletico fan in ´serious condition´ after being stabbed before Sevilla game|
|Atletico Madrid 1 Sevilla 2: Montella´s men stage dramatic first-leg comeback|
|Lukaku will score 30 goals for Man Utd this season, predicts Yorke|
|Liverpool loan Grujic to Cardiff|
|Mbappe: More to come from Neymar & Cavani partnership|
|Messi the greatest ever despite no World Cup win, insists Di Maria|
|Villa determined to earn place in Spain´s World Cup squad|
|Walcott swaps Arsenal for Everton|
|You even learn from Guardiola at home - Otamendi lauds Pep impact|
|Otamendi pens Man City deal to 2022|
|Neymar leads tributes to retiring Ronaldinho|
|Ronaldo must focus on playing - Zidane sidesteps exit talk|
|Zidane still an idol for James despite ´sad´ Madrid exit|
|Stoger will stay at Dortmund if ´everything fits´|
|Bordeaux´s Malcom facing disciplinary action over social media video|
|Ronaldinho retires – The greatest Brazilians to play for Barcelona|
|Athletic reward Williams with contract until 2025|
|Jones taking unlikely inspiration from City in United´s title pursuit|
|Moyes unaware of Chelsea interest in Carroll|
|Verdi wants Bologna stay amid Napoli links|
|Ronaldinho retires – A shining light of Brazil´s 2002 World Cup-winning team|
|Ronaldinho retires – a World Cup and Ballon d´Or among Brazil great´s prizes|
|World Cup glory and Bernabeu magic - Ronaldinho´s best moments for Barca and Brazil|
|Ligue 1 Review: Balotelli at the double as Payet shines and Malcom toils|
|Pato still dreaming of World Cup selection|
|FA Cup Review: Iheanacho makes VAR history, kit confusion reigns|
|2016-17 UEFA Study: PSG, Man City drive record-breaking spending|
|Conte packing in homework as Chelsea games stack up|
|2016-17 UEFA Study: Manchester United record highest revenue but largest debt|
|2016-17 UEFA Study: The headlines in transfers, wages and revenues|
|Iheanacho scores English football´s first VAR goal|
|Materazzi not surprised by Coutinho transfer fee|
|Ronaldinho retires - Brazil and Barca great plans 2018 farewell|
|Koziello swaps Nice for Cologne|
|Simeone ready to unleash Costa and Vitolo alongside Griezmann|
|Lambert ´never thought´ he would return to Premier League|
|Wenger ´very aggressive´ towards referee Dean, says FA report|
|Reported Arsenal target Malcom starts for Bordeaux vs Caen|
|Valverde not making big deal of Dembele´s latest Barca blow|
|Arsenal will have a ´hard time´ signing Malcom|
|Ronaldo and Madrid nominated for Laureus awards|
|Nantes´ Diego Carlos brands Chapron clash ´historic´|
|This is not important - Conte unconcerned if substitutions upset Hazard|
|Conte ´doesn´t think´ Chelsea have pursued Sanchez|
|Emery hints at Neymar return against Dijon|
|Mkhitaryan key to United-Sanchez deal, claims Raiola|
|Tevez: CSL spell was a holiday|
|Mignolet considering Liverpool future|
|Fred waiting for Guardiola call amid Man City speculation|
|Inter confident but patient over Rafinha|
|Giggs had counselling after Old Trafford exit|
|Neville: Mourinho would happily swap Mkhitaryan for Sanchez|
|Man United becoming Pogba´s team – Mourinho|
|Can ´talking with everyone´ but hints at Liverpool stay|