Arsenal centre-back Shkodran Mustafi has completed a permanent move to Schalke.
Mustafi terminated his deal at the Emirates Stadium and signed a six-month contract at Schalke, with the Gunners due to be paid a small compensation fee.
The 28-year-old became keen on a move back to Germany after falling out of favour under manager Mikel Arteta this season, making just nine appearances, three of which have come in the Premier League.
Mustafi, a World Cup winner with Germany in 2014, signed for Arsenal in 2016 from Valencia in a £35m deal.
In his four-and-a-half-year stay at the Emirates, he won the FA Cup twice and helped the Gunners reach the Europa League final in 2019.
Schalke needed a replacement for Ozan Kabak, who has sealed a move to Liverpool after a deal was agreed on Deadline Day.
The Merseyside club, who have been racing to get a deal done for the 20-year-old, are paying an initial £1m, rising to £1.5m in potential add-ons, to take the defender on loan.
Liverpool will have the option to buy him in the summer for an initial fee of £18m, potentially rising to £26.5m with add-ons depending on his appearances for the club as well as their performance in the Champions League.
“We are convinced that with Shkodran Mustafi we have been able to sign a very good central defender who will fill the sporting void that Ozan is undoubtedly leaving behind,” said Jochen Schneider, Schalke’s sporting director.