Adrian was heavily criticised for their 7-2 thrashing by Aston Villa and also received a dig from Grujic on social media.
The young midfielder responded to an Instagram post about hat-trick hero Ollie Watkins saying: "The first couple of games the man is nowhere to be found, I impatiently decided to move him (out of my team) in Fantasy... the rest is history."
Then using a sly face emoji, he added: "Probably also ended Adrian's career at LFC."
Enrique responded on Instagram: “I'm not sure if this is true?
“Can someone verify if it is? Because if it is I don't know what the f*** he is doing, seriously.
“Killing one of your ex team-mates (for now), because he is away on loan, when on top of that he has to be back next season. Makes no sense."