Conor McGregor may be his toughest opponent so far. Why? Because Aldo has shown that he can deal with great fighters who can mix wrestling with striking ( Mendes, Frankie, Lamas ) but I truly believe that he hasn't faced a striker like McGregor. With that being said, Aldo may surprise me. He has the tools to KO anyone, of course. I just believe that all those three top fighters that he beat soundly would be tougher stylistic opponents for the irish talker. I just have a weird feeling for this.