DETROIT – Alistair Overeem posted a reassuring message on social media following a scary first-round knockout loss to Francis Ngannou in the UFC 218 co-headliner.

Overeem (43-16 MMA, 8-5 UFC) succumbed to one of the most brutal one-punch finishes of the year when he absorbed a massive uppercut from Ngannou (11-1 MMA, 6-0 UFC) in their heavyweight title eliminator at UFC 218, which took place at Little Caesars Arena in Detroit and aired on pay-per-view following prelims on FS1 and UFC Fight Pass.

Despite the brutal nature of the finish, Overeem insists he’s in good health. He said afterward that he plans on taking some time off before getting back on the horse for his next run toward the top (via Twitter):

Overeem’s knockout loss to Ngannou was the 11th of his MMA career, which is the most of any active fighter on the UFC roster.

For complete coverage of UFC 218, check out the UFC Events section of the site.