Chelsea manager Frank Lampard's decision to make use of his back four has been praised and according to Martin Keown, the Blues could easily challenge for the Premier League title.
"Lampard was chopping and changing his defence. It felt like everybody was on trial," Keown wrote in the Daily Mail.
"But Lampard has found his most reliable back four in Ben Chilwell, Thiago Silva, Kurt Zouma and Reece James and it’s paying dividends.
"Whereas previously he could not decide on his centre back pairing, Silva and Zouma have become his regular partnership.
"Since the start of October, they have started together seven times. Chelsea are unbeaten in all of those and have kept five clean sheets.
"Previously, the Blues’ habit of ball-watching was getting them into trouble.
"Their naivety was on show in a 3-3 draw with Southampton, which took them to 65 goals conceded in 43 Premier League games under Lampard. Now, they’ve shut that door."
"Whereas once Chelsea looked disjointed under Lampard, the pieces of the puzzle are now coming together," Keown added.
"Beating his old boss on Sunday — to possibly go top of the Premier League if Liverpool do not win on Saturday — would be another big piece falling into place"