Chelsea manager Jose Mourinho believes his side's last two performances are very important.
He made the comment ahead of Chelsea's premier league encounter with West Ham tomorrow.
Chelsea defeated Aston Villa by 2-0 in the English Premier League last Saturday and drew 0-0 with Dynamo Kiev on Tuesday night in the UEFA Champions League.
‘They are important, not just the clean sheets but the way the team played to keep the clean sheets. They were not occasional clean sheets, ones based on super goalkeeper performances, they were both clean sheets based on good teamwork," he said, reports Chelseafc.com.
‘I try to make the best decisions for the team, I analyse the opponents and what I think the game can be. I try to reduce the unpredictability of every match. This is not about defenders, this is about the team and the team defended really well as a team in both matches.’