Chelsea boss Andre Villas-Boas insists he can be flexible.

With Villas-Boas wedded to the way his side plays, would he consider a change in formation, as Carlo Ancelotti did last season in order to halt Chelsea's alarming slide?

"I think we have played various systems," he said ahead of Saturday's trip to Blackburn.

"We tried a 4-1-3-2 against West Brom, then played the Norwich game with that structure.

"We had a different one in the second half against Manchester United, 4-2-3-1, with (Juan) Mata in the number 10, and we've tried the diamond formation.

"But it's not about a structure that will make us defend or attack better."