Salah managed to play on for several minutes after receiving treatment, but was forced to leave the field in tears just moments afterwards.
The free-scoring Egypt global has been the driving force behind the Reds' unexpected run to Kiev, netting 10 goals since the beginning of the group stage in an extension of his Premier League Golden Boot-winning form. This season he has 10 goals in Europe, only Ronaldo has more with 15.
Salah had ended the season by breaking the Premier League goals record previously jointly held by Alan Shearer, Luis Suarez and Cristiano Ronaldo.
It is reductionist in the extreme to bring Saturday's final down to just two players, given the strength in depth available - especially in attack - to Madrid and Liverpool.
"Cristiano knows that a player can have hard moments". And the performance of both players this evening in the Champions League final in Kiev could be the decisive factor in the judges' decision.
"That's not important", he told reporters on the comparisons with Ronaldo and Messi.
Brazilian icon Rivaldo has urged his former club FC Barcelona to consider going after African superstar Mohamed Salah, who is also said to be a transfer target for Real Madrid. Last winning the Champions League 13 years ago, in remarkable circumstances, the Reds are seeking to dethrone Real Madrid to lift their sixth European Cup.
"No, I don't think so (there is any blame)", Lampard said.
The Reds lost home and away to los Blancos in the Champions League group stage in 2014.