It is Valentine's Day today - in case you hadn't heard - and naturally we've been reminiscing about the best defensive partnerships in football .
There have been some cracking pairings in the Premier League over the years. ( Titus Bramble and Jean-Alain Boumsong anyone?)
But who was the best centre-back duo? Well, not who you may think, according to research by bwin.
They have analysed all defensive pairings that played more than 5000 minutes of Premier League football together and worked which duo has the best goals conceded per minute record, when scaled to an entire 38-game season.
Click through the gallery above to see the top ten defensive partnerships in Premier League history...