Liverpool side will face in Sunday's Premier League showdown.Klopp's side head to Old Trafford eyeing a win that would boost their Champions League chances and could also end their rivals' title hopes.United must win to keep alive their slim chances of catching Manchester City at the top of the table - but they head into the clash boosted by Thursday's thrilling 6-2 win over Roma.Liverpool boss Klopp says Ole Gunnar Solskjaer's side face a "tough challenge" to recover in time for Sunday's afternoon kick-off.But he expects to face largely the same team that took control of the Europa League semi-final - with a few tweaks."It's really a tough challenge, definitely, for them," said the Reds chief on Friday. "Today they obviously recover,.
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