Coach Vilanova last month underwent surgery on his parotid gland as he started treatment for cancer for a second time.
The 44-year-old first had a tumour removed from his throat in late 2011 and he is also undergoing chemotherapy.
The season resumed in Spain this weekend following a fortnight break with Barca hosting Espanyol as they look to increase their lead at the top of the table.
Roura told reporters: "Tito is on the bench.
"He still has treatment to do, but he is very animated and very strong, and this is important."