Liverpool crashed out of the FA Cup and continued their dreadful start to the new year as they were beaten 3-2 by Manchester United at Old Trafford on Sunday afternoon.

A brace from Mohamed Salah was not enough for Jurgen Klopp's side, as goals from Mason Greenwood, Marcus Rashford and Bruno Fernandes earned the home side the victory, to set up a fifth-round tie with West Ham.

Whilst young Rhys Williams struggled on his return to the side, it was perhaps the performance of Andrew Robertson that will concern Jurgen Klopp the most, with the Scottish international nowhere near his best on Sunday afternoon.

As per SofaScore, the left-back would pick up a dreadful 5.9 rating for his display, which was the second-worst of any player on the pitch, with only Williams rated lower.

The 26-year-old was caught way out of position for United's first goal of the game and couldn't get back to stop Greenwood from scoring, and resorted to shouting at the young forward, presumably in an attempt to put him off.

It seems as if Greenwood had the better of Robertson throughout the game, as he was rated as United's best player, earning an 8.3/10 for his performance.

The former Hull City man was also dribbled past on four occasions, suggesting that he struggled defensively during the game at Old Trafford.

Robertson also failed to win any of his five duels during the game, meaning he was the only outfield player from either team who started the game and didn't win a single duel.

The £67.5 million-rated left-back also struggled when going forwards, as he lost possession on 11 occasions, played no key passes and failed to find a Liverpool shirt with any of his crosses.

For comparison, the Scottish defender has averaged 1.9 key passes per game in the Premier League this season, emphasising that United were able to completely nullify his attacking threat on Sunday afternoon.

Therefore, whilst Williams struggled, he is only 19-years-old and was thrown into a pressure situation by Klopp so it was always going to be tough for him, whereas Robertson has plenty of experience in these sorts of matches but he also produced a really poor display, one that Klopp would not have been expecting.

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