Jose's fury at flops! Chelsea boss lashes out at strikers again after timid showing in front of goal costs them semi-final place

Jose Mourinho bemoaned Chelsea’s lack of killer instinct and admitted he may have to revert to the cautious approach of old after seeing his side suffer an extra-time defeat in the Capital One Cup quarter-final at the Stadium of Light.

Pegged back by a late equaliser from Fabio Borini, Chelsea were then sent crashing out by a 118th-minute winner from Sunderland substitute Ki Sung-yeung.

Mourinho was at a loss to explain the result but revealed he may have to consider a change of strategy to salvage their season.

Anger: Jose Mourinho looks on thunderously as his side crash to a shock defeat at Sunderland

Biggest moment: Ki Sung-yeung showed all Chelsea's strikers how they should finish at the death

‘I don’t want to become more defensive, but maybe the way to rectify the problem is to have a different approach,’ said the Chelsea manager. ‘If I want to win 1-0, then I can, because it is the easiest thing in football.

‘In this moment every game we don’t kill we are in trouble and sometimes we lose matches that we shouldn’t.

'We have to score goals and kill opponents and not just be dominant in every game and not just be the best team in every game but win matches. You have to win matches and not be the best team.

‘It keeps repeating itself, against Stoke, Everton, Newcastle and now against Sunderland. We score in the first minute of the second half, and if we score another, with all our chances, then it is goodbye. But we don’t and our opponents keep breathing.’

Not potent enough: Demba Ba looks on in disbelief after they concede the extra time winner

Good enough? Samuel Eto'o failed to find the net again for Chelsea

Sunderland midfielder Lee Cattermole believes their win will have a positive effect on their attempts to secure Premier League safety from their current position at the bottom of the table.

‘It’s a great win, it’s not the league but it gives some momentum going into Saturday,’ he said.
‘It gives us some belief, it is massive for the squad.’

Manager Gus Poyet echoed Cattermole’s assertion ahead of Saturday’s home game with Norwich. ‘People ask me before, which one do you want to win? Both — I hope we can win on Saturday,’ he said.

‘That was the idea we want, to maintain that consistency. The players gave everything today and I hope they have turned the corner. Like this we can be a very difficult team to play.’