Liverpool boss Jurgen Klopp must have breathed a major sigh of relief after surviving a mighty scare against Villarreal on Tuesday night.A shocking first-half saw the Spanish side draw level on aggregate after goals from Boulaye Dia and Francis Coquelin where the Reds looked completely lost as Unai Emery's men put them to the sword.
But Liverpool resumed control after the break and deserved to go through after the introduction of Luis Diaz completely changed the game.Fabinho put Liverpool ahead on aggregate after a shoddy error from the goalkeeper Geronimo Rulli when his shot went through the former Manchester City star's legs.
And Diaz made sure of the result when he latched onto Trent Alexander-Arnold's cross to head home to restore Liverpool's two-goal lead before another error from Rulli allowed Sadio Mane to net and put the game to bed - but where did Klopp go wrong?After scoring the winner against Newcastle, Klopp went with Keita in his midfield in quite the gamble with reliable options Jordan Henderson and James Milner on the bench.
It backfired.Keita had an absolute nightmare first-half and was lucky not to be hauled off before the break, making error after error and nearly giving away a goal when Alisson was close to giving a penalty away.
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