RIO DE JANEIRO – Jose Aldo was dominant once again on Saturday, but it may be a while before he’s able to be again. Aldo (23-1 MMA, 5-0 UFC), the UFC’s featherweight champion, defended his title with a fourth-round TKO of Chan Sung Jung (13-4 MMA, 3-1 UFC) in the main event of UFC 163, which took place at HSBC Arena in Rio de Janiero. Aldo won the fight not long after Jung, “The Korean Zombie,” appeared to separate his right shoulder throwing a combination. When Aldo saw the shoulder injury, he took advantage and got a fairly quick TKO in the fourth round. But after the fight, Aldo said he was injured, too. The Brazilian fighter believes he may have broken his foot against Jung. “He knew I’d be giving him low kicks, and I think the first combination I kicked straight at his knee,” Aldo told MMAjunkie.com (www.mmajunkie.com) at the event’s post-fight news conference. “I don’t know if I broke my foot, but I can hardly walk on it.