If you say it, I don't think you're agreeing with the statement, you're just saying that if it's close round/fight then the judges are probably wearing 'champ tinted glasses' and are going to see it in the champ's favour.

it's like if you say "fighting in so and so's back yard... you need to knock him out to win' it doesn't mean you're saying that there is some rule in place that means you have to knock a fighter out in his home town in order to get a win, just that you think the judges will favour him.