It comes as a timely boost, as the Nerazzurri prepare for Tuesday.
Calhanoglu could feature from the bench as early as Tuesday, giving Chivu a welcome option in midfield as Inter look to overturn a 3-1 first leg deficit.
Dumfries, meanwhile, is expected to be available for Saturday’s Serie A clash with Genoa as he continues his comeback from injury.
Nicolo Barella also returns after serving his one-match suspension at Lecce.
The news arrives on the back of a 2-0 victory at Lecce that extended Inter’s lead at the top of Serie A to ten points over AC Milan.
Corriere della Sera were effusive in their assessment of the Nerazzurri’s depth, noting that even without several key players, Inter’s substitutes proved decisive.
Indeed, with Mkhitaryan and Akanji both scoring from Dimarco corners, which the outlet described as now being “Inter’s main weapon.”
Key personnel are returning and momentum is firmly on their side.
Therefore, Chivu’s squad heads into one of the biggest nights of their season in excellent shape.