Chelsea boss Frank Lampard admits he may shake up his formation for their clash with Aston Villa.
Chelsea must bounce back after defeat at Arsenal.
Lampard said, "When we changed the system before it certainly helped us get an uplift because we weren't feeling as fluid as we like to be, and it is my job then to look at it and feel if we can be better.
"I think it helped but the players are the ones. As much as the players weren't good in the first half against Arsenal, they were very good for a long period and were improving in that unbeaten run so it is a case of staying strong mentally and just bringing back the good basics to get you on that run, because we have a talented squad.
"There is a lot of uplift in it but you have to keep hitting the basics day in day out. The few defeats we have had recently are because we dropped off a little and it is my job to pick it back up."
