Isaac Success has signed a five-year contract with English Premiership side, Watford from La Liga side Granada CF, according to SkySports.
The deal is worth £12.5million (about N4.8 billion).
The former Nigeria U-17 and U-20 star netted six goals in 30 appearances in the league for Granada.
With Odion Ighalo and Troy Deeney both set to remain at Vicarage Road, new-signing Success wil be expected to compete for a place in Watford’s starting line up.
His transfer was reportedly secured earlier on in the year but it was agreed that there would be no official announcement until the end of the season out of respect for Granada’s relegation battle in La Liga.
After months of speculation the two clubs have now officially confirmed the deal.
The 20-year-old has established himself as one of Europe’s brightest young talents after helping his side eventually avoid the drop with a series of impressive performances.
He had been linked with a number of European sides, including Paris Saint-Germain and Inter Milan, but Success’ agent, Dominic Egbukwu, insisted last February that the player would be making the switch to Vicarage Road.
In a farewell letter to Granada’s supporters, Success wrote: “Today is a bittersweet day for me, because through this letter, I want to say goodbye to the best fans that you can have, of my colleagues, of all workers in the club who have both supported me since I arrived in Granada, in addition to this city that has given me everything.”
“Now I begin another professional stage, which would not have been possible without my learning and development in Granada.”
Success has been comfortable playing on either side of a front three or as an out-and-out striker during his time with the La Liga club.