Sunderland have signed Ecuador winger Nilson Angulo from Anderlecht in a deal worth £17.5m.
The 22-year-old has penned a four-and-a-half-year contract on Wearside, with the option of a further year.
"Nilson is an incredibly exciting prospect, and we are delighted he's chosen to join Sunderland," said Sunderland sporting director Kristjaan Speakman.
"A quick and creative wide player, he excels in all the core actions required to impact the final third, and he arrives ambitious to make an impression.
"He's young but has already had many interesting experiences as a senior player domestically, on the European stage, and internationally with Ecuador.