At that weight Tszyu is almost certainly the most likely, because Tito fought only a handful of matches at the 140 pound limit, early in his career, while Tszyu fought his entire career at super lightweight. In fantasy fight Trinidad is usually considered in the three weight classes in which he was world champion: welterweight, super welterweight, and middleweight. He and Tszyu were different sizes.
Next we will see mythical matchup between Koysta Tzysu and a eight year old Tyson Fury since that was probably the last time Fury weighed 140 pounds. I'm still going to pick an adolescent Fury just to **** off the Australian Tzysu nut huggers on this forum.
If you're going to make these Tszyu threads have it against fighters that actually competed at 140. Tito is far too big to make Jr Welterweight so you'd have to starve him or have Tito as a teenager competing at the weight. And neither of those examples are realistic. What about Tszyu vs Aaron Pryor, Eddie Perkins, Jose Napoles, prime Julio Cesar Chavez, Manny Pacquiao, Pernell Whitaker, Antonio Cervantes, Wilfred Benitez, Meldrick Taylor, etc. Plenty of other interesting match ups with notable fighters who actually competed at 140.
Let's say this is a Trinidad who can actually make 140 without draining himself... I pick Trinidad to dominate Tszyu. I was never that blown away by Tszyu. Any fights to watch that might really change my opinion?