Diego Costa's display against Porto pleased Chelsea manager Jose Mourinho, despite the striker failing to score.
Chelsea manager Jose Mourinho praised Diego Costa and believes only confidence is missing in the striker's game.
Costa's struggle for goals continued as Mourinho's men reached the last 16 in the Champions League with a 2-0 win over Porto on Wednesday.
The Spain international was involved in a dispute with the manager in November and has scored just four goals in all competitions this season. Mourinho was happy with Costa's performance against Porto and said the 27-year-old was just lacking confidence.