Liverpool's defensive frailties were exposed at the weekend when they conceded three goals away to Watford.
All summer long they have been tipped to sign another centre-back, but have had a singular focus on Virgil van Dijk, with the Liverpool Echo reporting he has been their top target with no alternatives lined up.
The performance at Vicarage Road showed they cannot wait any longer. Meanwhile as competitors Tottenham line up Ajax sensation Davinson Sanchez, Liverpool should act.
Rated at £35 million, Sanchez is just 21-years-old and is viewed as one of the top defensive talents in world football.
He scored six goals from defence last season in the Eredivisie, and starred as Ajax reached the Europa League final.
Liverpool may be able to offer Sanchez a more assured shot of first team football, although Tottenham's shift to playing three at the back could provide an opening for him.
Sanchez is a player who may be worth £35 million now, but he could be worth even more in the future if he carries on improving.
The jump to the Premier League will be testing for him, but he is the type of player Liverpool must be targeting.
Focusing on hope they will sign Van Dijk but not actually submitting a bid is looking like a mistake, and they now risk seeing rivals Tottenham steal off with a player who would markedly improve their starting XI - unless they make a late bid of their own.