Schalke chief Jochen Schneider is happy with their deal for Shkodran Mustafi.'
The released Arsenal defender signed on Monday as a replacement for Ozan Kabak after he was allowed to leave for Liverpool.
Schneider said, “We were able to strengthen ourselves within the framework of our tight budget.
"We are sure that with Shkodran Mustafi we have more than adequately filled the gap that Ozan leaves.
"This is undisputed in terms of sport."
