4-1-4-1 4-4-1-1, bit more advanced though I'll explain. Effectively Mata is a left winger and Hazard is in the number 10 position. Ramires is more of a wide midfielder, Mikel sitting slightly deeper and Oscar just a CM. Mata and Hazard could interchange positions (similar to what Inter Milan's Ricardo Alvares and Wesley Sneidjer did in this formation under Andrea Stramaccioni in May when Inter beat AC Milan 4-2.) If they both end up in central positions the team can switch to 4-3-2-1 or a 4-3-3 basically with Ramires coming inside as a box to box midfielder. Also if we occupy the build up play more to the left with Hazard and Mata interchanging, we could then spray the ball to right into space catching teams out (hopefully) where our right back could go and deliver the ball in to the box. Kind of links on with the bit I just mentioned, if we had a right back like Dani Alves or Maicon we could play a 4-4-1-1 but with 3 central midfielders in Ramires, Mikel and Oscar, the ball could come inside to either Oscar, Mikel and Ramires and then to the right back who could go further up and provide a cross/shoot for goal as Ramires isn't the greatest crosser in the world. (Similar to what Inter did with Zanetti coming inside more and Maicon having all the right flank to himself.) Also it enables us to get more bodies into the box if we have a third central midfielder spare rather than having a winger and full back both in the flank. Just an idea, read about Stramaccioni's tactic vs Milan and wondered if we could use it but for a start we'd need a more attacking right back with pace, good delivery and stamina being able to go back and fourth easily. http://www.zonalmarking.net/2012/05/07/inter-4-2-milan-inter-build-up-play-down-the-left-then-spread-it-to-the-right/