An 86th minute goal from Liverpool substitute Divock Origi gave Jurgen Klopp's side a dramatic 3-2 win away to Newcastle United on Saturday night to keep their title hopes alive in another dramatic Premier League weekend.
Salah was carried off at St James' Park with a head injury sustained in an accidental collision with the Newcastle goalkeeper Martin Dubravka.
Origi, who also scored a 96th-minute victor to beat Everton in the Merseyside derby in December, Shaqiri and Daniel Sturridge have made important contributions in a supporting role to a club record points tally for Liverpool this season.
"He will not be ready for Tuesday and the rest we will see", said the German on the possibility Firmino could be fit for Liverpool's final league game of the season against Wolves on May 12.
"What I heard, he got the hip of the goalie on his head", Klopp said.
Here, Press Association Sport takes a look at what we learned from the latest round of league fixtures.
The potential absence of Van Dijk will come as a huge blow to Klopp with Liverpool's Champions League hopes already hanging by a thread. He was on the ground, the doctor had to make the decision and that was to take him off.
Firmino's last appearance for Liverpool was during the first leg of the semis against Barcelona at Camp Nou on Wednesday.
"I accepted long ago we do everything (we can)", said Klopp, whose side have lost only once in the league this season.
'Two of the world's best strikers are not available tomorrow and we have to score four goals to go through in 90 minutes. How many times have we been written off and people think, "OK, this isn't going to be our game" or whatever?
The towering centre-back has been a lynchpin in a Liverpool defence this season which has conceded only 22 times this term, the joint-fewest goals in the Premier League with Manchester City. "That's why, arriving at this stage. after 100 points (last season), is the most satisfaction I've had as a manager", he further added. "No one expected us to be in this position at the start of the season", the Tottenham manager said after Nathan Ake's late victor and Mark Travers' superb display. He was then fine but of course we have to wait.