Ravel Morrison has returned to parent club West Ham from Cardiff City on compassionate leave.
Brighton boss Sami Hyypia is weighing up a move for former France captain Alou Diarra.
Reus has been linked with a move away from Dortmund this summer after reportedly attracting attention from some of Europe’s top teams, including Manchester United and Barcelona.
Atletico Madrid were also rumoured to be interested but their president Enrique Cerezo last week ruled the Spanish side out of the running and claimed that Reus had turned down a move to Manchester United.
The 25-year-old remains under contract at Dortmund until 2017 and Klopp is convinced that he will continue to be a key part of the club’s future.
“I can tell you I have a great feeling regarding Marco Reus' future at Borussia Dortmund,” Klopp told Deutsche Presseagentur.
“Marco will definitely be around at our club for quite a while.”