Chelsea full-back Branislav Ivanovic believes that Diego Costa and Cesc Fabregas are essential components of the Blues line-up.

Both players were instrumental in the club's 1-0 win over London rivals Arsenal at the Emirates Stadium on Sunday, highlighting their importance to the reigning Premier League champions.

"Cesc and Diego are playing really well," Ivanovic told club's official website.

"These kind of guys attack with the special things they have and when we include that in a game we get results.

'It's always guys in attack who make a difference. For us it's very important for Diego to score and for Cesc to assist with great passes."