The midfielder was forced from the pitch after 30 minutes of play of the 2-1 win at Villa Park after pulling up with a muscular issue.
Jürgen Klopp admitted the Reds will need to wait for further assessment, though revealed Fabinho felt ‘positive’ about the problem.
The manager told his post-match press conference: “I don’t know [how bad it is]. He felt the muscle, not too much.
“He is quite positive but I’m not sure what I can make of that, to be honest. We will see.
“I think the rest came through without problems. Robbo was not in the squad today because I wanted to give him just a rest at home and bring another striker into the squad if we needed, that’s it.
“Apart from that, we should be fine.”
On Fabinho, Klopp added: “He has a good feeling and that gives me a better feeling than I had and I took him off. What that means, I don’t know yet.”