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Liverpool haven't lost many big games so far this season, or many games at all for that matter. However, one that they did lose, which saw the title race swing back in the balance after a 2-1 defeat to Manchester City, was defined by a key battle which turned out to be the narrative of the match...

Trent Alexander-Arnold vs Leroy Sane was the order of the day at the Etihad Stadium back in January, and was ultimately what cost the Reds a result against the Champions.

Whilst the England international had a productive evening going forward against the Citizens, playing a huge role in Roberto Firmino's equaliser, his defending against German international Sane was poor - the former Schalke man ended up scoring the winning goal and got the better of the 20-year-old throughout.

The Liverpool academy graduate will find himself up against a similar goal threat when the Reds take on Bayern Munich this week in Kingsley Coman, a man who, like Sane, possesses great pace and strength and has the ability to finish his chances with ease.

What can Klopp do to help him?

22-year-old Coman scored two goals and recorded an assist in Bayern's last league game against Augsburg, so Alexander-Arnold will be coming face to face against a man who is bang in form.

Alexander-Arnold is a huge part of his side's attacking game, where his ability to switch the play, deliver dangerous crosses and zip passes into midfield are all huge elements of Jurgen Klopp's attacking style.

When up against a tricky, direct opponent such as Coman, however, Alexander-Arnold may need some support.

Pragmatic midfielders such as James Milner, Gini Wijnaldum or Fabinho - whoever Klopp opts to deploy in midfield on the night - must stay close to the young full-back and ensure he doesn't get left one-on-one against Coman.

If they don't support him, it could well be another big defeat for Klopp's side and leave them with an uphill battle in the second leg.