Tottenham Hotspur may be regretting their decision to sell Steven Caulker back in 2013 now that Mauricio Pochettino has been placed in charge.
Caulker was a shock departure from White Hart Lane two summers ago, when he joined Cardiff City in a move worth over £8 million, and Spurs may be rueing their decision to allow him to go.
Although Caulker has not been a revelation at either Cardiff or Queens Park Rangers, whom he has since signed for, there is an argument to suggest that he would have been a better fit for Tottenham under Pochettino than most of their defensive options at the moment.
Since Caulker's departure, Spurs have struggled to find a regular centre-back pairing. Although Jan Vertonghen is a top-class player, there has been a lack of options to accompany him in the heart of the defence.
The likes of Michael Dawson, Vlad Chiriches and Younes Kaboul have all been utilised at centre-back by Spurs, but none looked of the quality to push the side on.
At the moment Federico Fazio is the first choice, but there are still question marks over the Argentine's ability.
A towering presence, he is dominant in the air, but his lack of mobility means he can be vulnerable, especially under a manager who likes to operate with a high line.
Pochettino has also proven that he has trust in youngsters to perform, if they have the ability; Ryan Mason, Nabil Bentaleb and Harry Kane have all benefited from this policy.
If Caulker had stuck around for just another 12 months he, too, may have been thriving at White Hart Lane currently, and he certainly possesses a lot of the attributes Spurs are lacking.
Pacey, mobile and technically adept, he represents that kind of ball-playing centre-back that Pochettino favours and Spurs may just be missing his quality now.