Deco and Michael Essien return to the starting midfield as the 'Christmas tree' formation is once again deployed. Deco will play alongside Nicolas Anelka, in behind Didier Drogba, with Frank Lampard playing deeper in midfield. Essien takes over the holding role from John Mikel Obi. The rearguard is unchanged from Fulham. Burnley are totally unchanged from the starting line up used in their win over Everton. Chelsea will line up in a 4-3-2-1 formation as follows: 1 Petr Cech 17 José Bosingwa 6 Ricardo Carvalho 26 John Terry © 3 Ashley Cole 13 Michael Ballack 5 Michael Essien 8 Frank Lampard 20 Deco 39 Nicolas Anelka 11 Didier Drogba Substitutes: 40 Hilario, 2 Branislav Ivanovic, 35 Juliano Belletti,12 John Mikel Obi, 15 Florent Malouda, 21 Salomon Kalou, 23 DanielSturridge. Burnley are expected to line up in the following 4-1-4-1 formation: Jensen; Mears, Carlisle, Bikey, Jordan; Alexander ©; Fletcher, Elliott, McCann, Blake; Paterson Substitutes: Penny, Kalvenes, McDonald, Gudjonsson, Thompson, Guerrero, Eagles. The referee is Mark Clattenburg. chelseafc.com