Xabi Alonso deep in thought in the dugout during Chelsea's 1-0 loss at SunderlandImage source, Getty Images
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Chelsea have five wins, four losses and a draw in 10 Premier League games under Xabi Alonso

ByNizaar KinsellaFootball reporter at the Stadium of Light

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.