Combate was first to report the booking. A venue and location have yet to be announced for the event.
Rozenstruik is coming off an unsuccessful main event appearance at UFC Fight Night 186, where he dropped a lackluster five-round verdict to Ciryl Gane on Feb. 7. The 33-year-old Surinamese heavyweight is 5-2 in UFC competition, with notable KO wins over Junior dos Santos, Alistair Overeem and Andrei Arlovski.
Sakai, meanwhile, had a six-bout winning streak snapped UFC Fight Night 176 last September, when he suffered a fifth-round TKO loss at the hands of Overeem. The former Bellator competitor began his UFC tenure with triumphs over Chase Sherman, Arlovski, Marcin Tybura and Blagoy Ivanov.