Jose Mourinho admits he is yet to settle on a starting XI which he considers to be the best available to Chelsea.
The Blues got back to winning ways on Saturday as they enjoyed a 2-0 derby victory over west London rivals Fulham, but questions are still being asked of Mourinho and his tactics.
Victory over the Cottagers came on the back of disappointing reversals at home and abroad, while the omission of Juan Mata from the matchday squad has raised plenty of eyebrows.
Mourinho has been quick to defend his selections and still has Chelsea sat fourth in the Premier League table, just two points off the pace.
He is, however, prepared to concede - with so many options available to him, particularly in midfield - that he is unsure what his best side is.
"Of course, I don't know," he told Chelsea TV.
"But the players have to give me the answers. I cannot dig and dig and dig looking for the best team. The players must give me the answer.
"Do I have a doubt that [Branislav] Ivanovic is in this moment my right-back? I have no doubt. You see the way the guy performs. So it is up to them.
"If somebody is waiting for me to give shirts because of status and history, that's not the point. Of course, I have some doubts in some positions and I think it's normal."
Nine of Chelsea's 10 Premier League points this season have come on home soil, but their next four fixtures will take them out on the road and Mourinho admits they face a real test of their credentials to compete on multiple fronts.
He added: "The situation is difficult, we have already played away to Manchester United and Everton.
"We have won all the matches at home and have nine points from that. Now we go away for four consecutive matches. In the Premier League we have Tottenham and Norwich, and go to Bucharest [to play Steaua in the UEFA Champions League] and Swindon [in the Capital One Cup].
"We have to improve away, get results. At our house, we have to be better, not just win, play better and score more goals. This is our objective.
"The good thing is that we're not being lucky but we're there [in the league] with 10 points and the period is not good, the results are not brilliant."