Chelsea defensive midfielder Mikel Obi has apologized for his costly blunder which led to Juventus leaving Stamford Bridge on Wednesday with a draw.<br /><br />With 10 minutes left, Juventus were trailing the European champions 1 - 2. Then a mistake by the Super Eagle led to the equalizer by the Italian champions scored by Fabio Quagliarella.<br /><br />Mikel told skysports: ''If I want to make up an excuse, I can. But, for me, I gave the ball away. I put my hands up, we move on.<br /><br />"I'm sorry about the mistake, but there are no excuses."<br /><br />Chelsea are away to Danish club FC Nordsj&aelig;lland in the next round of Europe's elite competition in two weeks time.