The Reds won 2-0 via goals from Diogo Jota and Sadio Mane.
Henderson later said: "Yeah, that was important for us. When we played them away we were 2-0 up and they got it back to 2-2, so we were quite wary of that and making sure that didn't happen again – manage the game properly, keep the ball, keep them running. Overall, pleasing. I thought we took the sting out of the game second half well and saw out the game well.
"First half I thought we were very good: on the front foot, creating chances, winning the ball back high up, some lovely play and some good goals. So, first half very good and then I thought the second half was a professional performance.
"They're a tough side, they make it difficult. We knew that when we played them last game. It was a big night for us. Like I said, first half was very good; second half, we managed the game well. Could have probably scored one or two more if we're being critical. But overall, I think we've got to be delighted with the performance and obviously qualified for the next round."
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