QPR loanee Tom Carroll wants to "make it at Tottenham" but is prepared to consider all of his options at the end of the season.
Ilkay Gundogan has commited his future to Borussia Dortmund by signing a new contract.
The 24-year-old has left Club Atletico Tigre in his home country for an undisclosed fee and signed a four-year contract with the French club.
Benoit Tremoulinas's departure for Dynamo Kiev left a vacancy at left-back, with the former River Plate player fitting the bill for last season's Coupe de France winners.
Orban's agent Filippo Colasanto had claimed that Sunderland had made a "concrete" offer for his client in June.