The bouts at UFC Apex will be on ESPN+, with the main card starting at 7 p.m. ET and prelims at 4 p.m.
Rozenstruik (11-2) has lost two of his last three fights after winning the first 10 of his pro career. However, the losses came against Francis Ngannou, who now owns the UFC heavyweight championship belt, and undefeated Ciryl Gane. Rozenstruik, 33, the only fighter from Suriname on the UFC roster, is No. 7 in the ESPN heavyweight rankings.
Sakai (15-2-1) is coming off a loss to Alistair Overeem last september, but prior to that the 30-year-old Brazilian had won six in a row.
How to watch the fights
Watch the fights on ESPN+. If you don't have ESPN+, get it here.
There's also FightCenter, which offers live updates for every UFC card.
Saturday's fight card
ESPN+, 7 p.m. ET
Jairzinho Rozenstruik vs. Augusto Sakai | Heavyweight
Walt Harris vs. Marcin Tybura | Heavyweight
Roman Dolidze vs. Laureano Staropoli | Middleweight
Santiago Ponzinibbio vs. Miguel Baeza | Welterweight
Dusko Todorovic vs. Gregory Rodrigues | Middleweight
Tom Breese vs. Antonio Arroyo | Middleweight
ESPN+, 4 p.m. ET
Makwan Amirkhani vs. Kamuela Kirk | Men's featherweight
Tanner Boser vs. Ilir Latifi | Heavyweight
Francisco Trinaldo vs. Muslim Salikhov | Welterweight
Alan Patrick vs. Mason Jones | Lightweight
Manon Fiorot vs. Maryna Moroz | Women's flyweight
Montana De La Rosa vs. Ariane Lipski | Women's flyweight
Sean Woodson vs. Youssef Zalal | Men's featherweight
Claudio Puelles vs. Jordan Leavitt | Lightweight