While Liverpool are unbeaten in the Premier League this season, their impenetrable wall hasn’t been so reliable in the Champions League.

The Reds are safely through to the knockout stages in defence of their crown, where they will face Atlético Madrid later this month, but their route there was not easy.

Placed in a group alongside RB Salzburg, Genk and Napoli, it’s fair to say that Liverpool had to fight hard to earn their place in the next round.

Salzburg proved to be particularly tricky opponents, as did Genk when they travelled to Anfield, but none were as difficult as Napoli.

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The Italian side inflicted Liverpool’s first defeat of the season in all competitions when they won 2-0 back in September, while they also picked up another point in the reverse fixture at Anfield in November.

They, alongside Aston Villa, are the only teams to beat Liverpool this year and speaking about their clashes, Lorenzo Insigne says he believes they became a bogeyman.

“Whenever we played against Liverpool we had great performances, against them we play stratospheric games, we became Liverpool’s bogeyman,” he told Sky Sport Italia.

“In two games this season we got four points against them, and that gives us great satisfaction.

“We left Anfield with a draw, and that served us well, even if we wanted to advance to the next round with a game to play.”