But the young defender is keen to use that disappointment as inspiration to finish the job against AS Roma next week and secure a place in the Champions League final.
It was confirmed on Wednesday that Oxlade-Chamberlain will miss the run-in and this summer's World Cup having sustained knee ligament damage during the Reds' 5-2 victory over Eusebio Di Francesco's team.
On the news, Alexander-Arnold told the Liverpool Echo: "It's a massive blow, he is a huge player for us.
"Obviously we are all gutted for him and we will be looking to secure a place in the final for him and the other injured lads.