Diego Simeone has just given Pep Guardiola a real problem for Liverpool

It was surely with a knowing nod that Liverpool, still glowing from once again winning through to the Champions League semi-finals, discovered what happened to Manchester City the same night.

After all, they know all about what can happen when you take on a Diego Simeone side.

Their Champions League visit to Atletico Madrid in February 2020 brought about the beginning of the end of the Reds' reign as European champions, with some of the antics of the Spanish side leaving a bad taste in the mouth.

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Certainly, rare are the occasions a manager has to substitute a player at half-time to avoid him being sent off due to provocation, as was the case with Sadio Mane in the Wanda Metropolitano.

When Liverpool gained a modicum of revenge by beating Atletico home and away in this season's group stages, there remained an edge to proceedings with the Spaniards having a player sent off in both games.

So while the Reds on Wednesday safely negotiated a late Benfica flurry to set up a last four clash with Villarreal, City were embroiled in what seemed approaching an all-out war in digging out a goalless draw at Atletico to set up their own