"versing" is not a verb.
Well what you’re using is slang and very common with kids these days. It is thought to have been picked up through video game terminology, but also through the ambiguous sound of the word “versus”.
What you are doing with this and “versing” is thinking that the original “versus” is a verb, when it’s in fact a preposition.
A preposition is a word that shows a noun or pronoun’s relationship with another word in a sentence. The common ones are things like: on, in, above, through, below and before.
In future use "play" or "playing" both are verbs. Eg. Cranbrook are playing Trinity this weekend.
Nice to put my teachers hat back on.