The Egypt striker suffered a hamstring injury in victory over Crystal Palace yesterday.
With Salah leaving Liverpool at the end of the season, there's now concerns he has played his last game for the club.
Former Reds captain Gerrard said: "It would be sad, but let's hope that's not the case.
"It's worse than Mo probably thinks it is now, but until you can get it properly assessed by the medical team, and you have an MRI scan, you don't really know the extent.
"But if it is the case that he's played his last game, that would be extremely sad - not just for Mo but for everyone connected with Liverpool Football Club, because he's been a legend and everyone wants to see him get the send-off he deserves."
