Diego Costa has claimed that he made a mistake, when he threw a training bib towards Jose Mourinho.
The Spain international has endured a miserable season so far, scoring just four times in 18 appearances.
Mourinho dropped the striker for their trip to Tottenham Hotspur in November and Costa flung a bib towards the manager, when it was obvious he would not play at all.
“I have to improve a bit,” Costa told Onda Cero.
“The start of the season has not been good for me – not in how I have played nor in goals.
“I know I have to be better to go to Euro 2016 with Spain. I have to work hard and fight, but I know I have time to improve and I hope I will.
“The bib [incident] is in the past. I made a mistake, but my relationship with Mourinho is amazing, we get on really well. There are things you need to control, but the bib thing was an impulse.
“The truth is Chelsea haven’t been in a great moment, above all losing the other day in home. Today it was important to win to make the fans happy and to recover our confidence.”
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