BBC Sport - Celtic: Efe Ambrose agrees four-year deal Celtic defender Efe Ambrose has agreed a new four-year contract with the Scottish champions. The 24-year-old Nigeria international arrived in Glasgow last August after joining for an undisclosed fee from Israeli club Ashdod. Ambrose has been a regular fixture in Neil Lennon's starting XI, scoring in the Champions League qualifier against Cliftonville in July. The new deal will keep him at the club until the summer of 2017. Ambrose told the club website: "I have thoroughly enjoyed my time at Celtic so far and I am absolutely delighted to extend my stay at such a fantastic club."