Porto boss Sergio Conceicao fears Chelsea's 5-2 loss to West Brom will have the Blues 'more awake to danger' in Wednesday's Champions League quarter-final first leg.
Conceicao has warned his Porto players to be wary of the wounded Blues, who succumbed to a first loss under new manager Thomas Tuchel in the Premier League on Saturday.
'You know that Thiago Silva was sent off in the first half and that the game had a different course,' said Conceicao.
Porto boss Sergio Conceicao is expecting a vicious Chelsea response after their recent loss
'Chelsea until this last game had been extremely competent, they have not lost a game in the Champions League, they have the second-best defence in the Champions League and also in the English League.