Britain\'s Amir Khan should think about retirement following his defeat by Danny Garcia, according to his world champion compatriot Carl Froch. , and suffered three knockdowns in total, as the American added the World Boxing Association (WBA) light-welterweight title to the World Boxing Council (WBC) belt he already held in a dramatic unification bout. It was Khan\'s second straight defeat following his controversial loss to Lamont Peterson, with the American failing a subsequent drug test, and third of his career following an earlier reverse at the hands of Breidis Prescott. Froch, the current International Boxing Federation (IBF) super-middleweight champion, said Sunday he would quit if he was in the same position as fellow Englishman Khan. \"I would retire if that happened to me,\" Froch told BBC Radio 5 Live\'s Sportsweek programme. \"Why? Because I am not in this sport to get beaten, knocked out, or outclassed. \"I\'ve lost twice, I lost a very, very close points decision to one of the best pound-for-pound fighters in the world in Andre Ward and I\'ve come back and beaten an unbeaten fighter, Lucian Bute, the very next time so I\'m world champion.\" He added: \"If I had lost to Lucian Bute I would probably have retired, because I am in this game to be at the very top and stay at the top. I\'m not in this game to make up the numbers. \"It\'s a personal decision whether or not you retire, but to get stopped in the fourth round and to be previously knocked out, it\'s just very, very damaging,\" Froch insisted.