They will face Newcastle United in the final on March 16.
A clip on his X/Twitter page showed that Isaac, who was dressed in his full Liverpool kit, was very confident as Mohammed Salah stepped up to take the penalty to put the reds 2-0 up.
Isaac declared Salah was “one of the best” before the Egyptian smashed his penalty into the top corner, leading Isaac and his family to celebrate.
Wembley here we come.”
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A picture was later taken showing Isaac holding up a scarf showing Liverpool right-back Conor Bradely.
Up the Reds.”
Isaac and his family were sent many messages of support last night after the posts.
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