Porto striker Evanilson arrived for his medical with Bournemouth on Thursday night ahead of signing in a £31.5million deal.
It is a club record for the Cherries with a potential £8.5m due in add-ons - taking the total fee to £40m - and a ten percent sell-on clause.
Bournemouth had an interest in Arsenal striker Eddie Nketiah too but their move for Evanilson could now pave the way for Crystal Palace and Nottingham Forest to step up their efforts to sign the 25-year-old.
The Cherries are looking to replace Dominic Solanke and have been eyeing up a move for Nketiah after his move to Marseille fell through.