The Reds are looking to build on last weekend's 2-1 win at Crystal Palace, when starting a busy month with a home fixture against another London side.
Cunha's availability is a boost, as he has trained after recovering from the knock he sustained in training that subsequently ruled him out of our last two matches.
Lisandro Martinez made his comeback as a late substitute at Selhurst Park but Harry Maguire and Benjamin Sesko remain sidelined.
"We have two doubts for the game," Ruben said at a press conference at Carrington to preview the 20:00 GMT kick-off.