Dejan Lovren - Liverpool
On current form, some of the Premier League's supposed leading lights are coming across as the worst defenders in the division. And no one exemplifies that more than Liverpool's Dejan Lovren.
Signed from Southampton for £20 million last season, the Reds centre-back has looked overpriced even at £2m, such has been his poor form. Whether it is a case of nerves or low confidence, or Lovren being made to look better at Southampton than he actually was, you will struggle to find a worse defender based on recent showings.
Younes Kaboul - Tottenham Hotspur
For a club captain, Younes Kaboul has hardly led by example this season. The Spurs centre-back produced a strong showing in the north London derby but seemed to go into hiding either side of that clash.
On the ball, the Tottenham skipper looks disastrous - and he has an even harder time chasing strikers without it. Whether Spurs persist with Kaboul is up to Mauricio Pochettino, although many Tottenham fans have already expressed their wishes that the 28-year-old is dropped for an indefinite period.
Per Mertesacker - Arsenal
Just across the capital, Per Mertesacker has endured a nightmare of a season at Arsenal. When playing alongside Laurent Koscielny, the German has looked calm and calculated, working superbly with his defensive partner.
But, since Koscielny's injury earlier this term, Mertesacker has been exposed as a slow, clumsy centre-back that is simply a hindrance to his Arsenal side. The Gunners have struggled at the back of late and that is in no small part down to Mertesacker's woes.
Glen Johnson - Liverpool
The second Liverpool defender to make the list, Glen Johnson's continued run in the Reds' starting line-up is one of the most puzzling aspects of Brendan Rodgers' management.
The 30-year-old looks like he can't defend at right-back - and fares even worse down the left. Johnson is out of contract in the summer and anyone interested in a defensive full-back may want to steer clear of the Liverpool man.
Rio Ferdinand - QPR
In his prime, one of the greatest Premier League defenders of all time - make no mistake about that. Since signing for QPR, however, Ferdinand has looked well past the requisite level to defend in the top flight, let alone defend for a side battling against relegation.
The centre-back has just turned 36 and QPR boss Harry Redknapp recently admitted the R's look 'more solid' without him. Is it time to retire for the former Manchester United man?