Since it was a tourney, it wasn't me playing against bji.
Don't worry, there is no need for justification. Everybody knows that you are a great player, and of course you are able to beat @bji1203 in single matches. :)
I know myself how it feels not to own some urgently needed cards in certain decisive situations. For example I am lacking four out of five two mana summoners at max level (and Prince Julian anyway), and concerning the five mana summoners I only own Prince Rennyn and The Peakrider at max level. Furthermore my fire and water splinters are rather weak ...
To choose your game (which you even didn't play yourself) was pure coincidence.
However, considering his over all performance, I think that currently @bji1203 is simply the best Splinterlands player.