From addonaddictblabla:

Any chance to add option to show pvp rank? By choice - 2v2 3v3 etc.

Would be a cool addition to M+ score - who knows maybe it would even work in BG's or open world pvp. Hover over enemy and see their ranking before engage

Source: https://www.curseforge.com/wow/addons/tip-tac?comment=3390