Would add lot of what happened in the coliseum was fixed in some way, as gambling was huge back then too and lot of under the table gimmicks were done
Had cool italian book about gladiatorial games (including animals) in ancient Rome, was bit hype killer read how essentially almost everything happening in the arena was to some extent fixed or having just few non-fixed legit things (where "well informed" people would not bet money) to mask it a bit
Considering lion was the local favourite as part of roman world imagery and tiger was seen as a foreign symbol of asia, would not be surprised if most in the audience would bet money on the lion due cultural bias (just think how on north-american site sherdog bunch of adults would tell you a grizzly would have "good chances" vs a rhino, because to them the animal is familiar), wich would make "help" the tiger the smart thing to do if you have hands on gambing money
On other side also the tiger winning vast majority seems suspect too, as that also would make the gambling suffer
Even imagining that could have been the case then "help" the lion would be the smart thing to do
At the end make most gamblers bet wrong was the core point for profit, so some sort of 50/50 (natural or fixed) was the most likely situation
Wich tbhwould make sense considering the animals used were roughly of same size and had similar weapons, to not count likely lot of lions/tigers were likely weakened by poor conditions and past injuries and have to face a fresh/healthy cat, often animals would be thrown there knowing they will lose just to be used for a show one last time
To be fair lions used by romans were a north african subspecies (barbary lion) wich is now extinct and used to be big as tigers
https://en.wikipedia.org/wiki/Barbary_lion
The mostly used tigers were a large and extinct subspecies too (caspian tiger), supposed to be bit smaller than siberian but bigger than bengal
https://en.wikipedia.org/wiki/Caspian_tiger
Actually if we want believe as accurate the weight claimed for these lions (i don't know if believe it) they were not only heavier than the caspian tiger, but they would be on average heavier than a siberian tiger too
But to not dive much on an answer we can't verify, let's take they was more or less of same size
Guess on general is not crazy believe that humans driving barbary lions to extinction, and killing lot of biggest subsaharian ones due trophy hunting in more recent centuries had heavy effect on today lions (and lot of other african animals) size
Even if also on tigers was noticed similar effect, have no way to know if to bigger or lesser extent
One thing we know is that ancient or even recent centuries past never spoke much about tigers being the bigger cat, while today would say on average seems kinda easy notice tigers (siberian/bengal) are usually more massive
But as general rule may add when it comes to the size of tigers, lions, grizzlies or any animal that had bit of cool factor going on, people will throw (knowing to lie or not) fake numbers or numbers without context
One would think with internet going on people would be MORE informed, yet apparently interned just made the bullshit machine louder
And most of times people today still recycle fake shit of fuckton of times ago
Like internet would still tell you in teh old west a grizzly 1-shot karate chopped a bull, because it was written on some 1800s newspaper
I mean who know bit would tell bear in the wild would not mess with bull bison, and even taking on a female or weakened individual (or a smaller animal, like a boar) it will be a relatively long struggle where bear will use his big strenght paws to grab trying to slow down the prey and keep it on the spot the bovid biting multiple times the back of the neck area
Yet the arena grizzly waited angry huge cocain bull twice his size charging at him like an calm anime samurai, and swiftly karatechopped it into death in mid run, because newspaper said so
Example another hilarious trend i seen is people engaging in "lion vs tiger" bullshit as if they're teams with supporters throwing at each others fake facts and insults, hoping to proof once and for all that "their" fav pokemon have higher dragon ball power level lmao
Cliffs: tigers, lions, bears, yourfavcoolanimal in real world tend to be smaller and less incredible than teh internet says lol