UFC Abu Dhabi is a stacked Fight Night event, and while fans can look forward to the middleweight title eliminator main event, there's plenty to anticipate on the undercard. Notably, the Abu Dhabi undercard plays host to a pair of fighters who belong to a very exclusive club.

Among those weighing in are former UFC middleweight champion Robert Whittaker (26-8 MMA, 17-6 UFC) and former ONE Championship two-division titleholder Reinier de Ridder (19-2 MMA, 3-0 UFC), who meet in a five-round main event.

Robert Whittaker and Reinier de Ridder were both on point without any problems with the middleweights hitting the scale early Friday morning in Abu Dhabi. The main event was made official after de Ridder was the first fighter to weigh in with the former two-division champion from ONE coming in at 186 pounds.