But as the Reds took to the training pitch at Melwood, there was no sign of Henderson, casting doubt over his involvement in the group stage clash in midweek.
There is no indication as of yet whether Henderson is injured, with Jurgen Klopp providing no update on his fitness in his pre-match press conference, but it is likely he will miss out.
Mohamed Salah was involved, however, as he continues to work his way back from an ongoing ankle problem.
It remains to be seen whether the Egyptian starts, with Klopp explaining ahead of the game that he is set to turn to “fresh legs” after the victory at Villa Park.
He is likely to alter his midfield setup, and along with Henderson at least one of Adam Lallana and Gini Wijnaldum should drop out, with Fabinho, James Milner, Alex Oxlade-Chamberlain and Naby Keita all training.
But with the under-19s also playing the same side in the UEFA Youth League on Tuesday afternoon, they could join Barry Lewtas and Neil Critchley‘s squad instead.
With temperatures dropping on Merseyside as autumn sets in, many of Klopp’s squad donned cold-weather gear, including Alisson, who trained as part of the goalkeeper’s group with John Achterberg and Jack Robinson.
In his pre-match press conference, Klopp paid tribute to his side’s next opponents, describing them as “a proper club” and “a really nice story,” in terms of how they develop despite losing key names every year.
He was quick to point out that, when read a list of their high-profile alumni, that Origi, “a Liverpool legend,” also began his career at Genk.
The manager dismissed questions on City, with his focus solely on the Champions League at this stage, with three points on Tuesday night key.
Liverpool Squad in Training for Genk
Defenders: Van Dijk, Lovren, Gomez, Van den Berg, Alexander-Arnold, Robertson, Williams
Midfielders: Fabinho, Wijnaldum, Milner, Oxlade-Chamberlain, Keita, Lallana, Jones
Forwards: Salah, Mane, Firmino, Origi, Brewster, Elliott