Constant changes in formation and personnel - and another disappointing defeat.

Xabi Alonso's frustration was obvious as Chelsea 's struggles for identity continued in the 1-0 defeat by Sunderland .

It is starting to feel as though the Spaniard is the latest "Tinkerman" at Stamford Bridge, a moniker first associated with Blues boss Claudio Ranieri back in 2002-03.

For the first time this season, Chelsea lined up with a three-man midfield - but they were also without a recognised striker for the second match in a row, with Pedro Neto again struggling to lead the line in their loss at the Stadium of Light.

By contrast, struggling Sunderland were led by target man Brian Brobbey, who won a 36th-minute penalty after being brought down by Levi Colwill.…