The Reds defensive duo have made an impressive start to the 2018-19 Premier League campaign to help Jurgen Klopp’s side challenge for the title.
Liverpool FC have traditionally struggled to sign quality players in full-back areas under Rafael Benitez, Roy Hodgson, Sir Kenny Dalglish and Brendan Rodgers.
Former Borussia Dortmund head coach Klopp signed Robertson to replace Alberto Moreno in the Liverpool FC team in the 2017 summer transfer window.
Liverpool FC benefited from the emergence of Alexander-Arnold at right-back as the teenager made 32 appearances in all competitions in the 2017-18 season.
The Reds pair have continued to shine in the first team in the current campaign and they played a key role in last weekend’s 3-0 victory at Watford.
Alexander-Arnold scored a superb free-kick to double Liverpool FC’s lead before Robertson played a direct role in Roberto Firmino’s third goal.
And former Spurs forward Crooks has spoken in glowing terms about Alexander-Arnold after his memorable goal.
“You’ve got Mohamed Salah, Jordan Henderson and Roberto Firmino, all of whom are superb from a dead ball position,” Crooks told BBC Sport.
“Yet the most inexperienced lad on the pitch stepped up, assessed the situation like a veteran and proceeded to leave Ben Foster in the Watford goal rooted to the spot and staring at the ball as it flew past him.
Robertson moved to Liverpool FC in an £8m deal from Hull City in 2017 after Moreno’s inconsistent performances under the German head coach.
BBC Sport pundit Crooks admits he is a big fan of Liverpool FC’s flying full-backs.
“He [Robertson] was lucky not to concede a penalty at a crucial time against Watford but the Scot got away with it,” Crooks added. “I’m not entirely sure even video assistant referee (VAR) would have changed the referee’s mind.
“The full-back went on to cause Watford all kinds of problems going forward. It was Robertson’s tenacity and eventual cross that finally killed the Hornets off completely.
“With Alexander-Arnold on one side and Robertson on the other, it’s been a long time since I’ve seen two such impressive young full-backs in the same team.”
Alexander-Arnold has scored one goal and has made two assists in 13 games in the Premier League, while Robertson has contributed three assists.
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