Filip Krovinovic has rejoined West Brom on a season-long loan from Portuguese club Benfica.
The 25-year-old midfielder spent last season on loan at The Hawthorns, scoring three goals in 43 games as West Brom achieved promotion to the Premier League.
Getafe and Bologna were also interested in signing the Croatian, who joins up with Slaven Bilic's squad ahead of Sunday's league trip to Southampton.
"It's an absolute pleasure to be back with family," said Krovinovic.
"I know it took a little bit of time but now I'm here and that's the most important thing.
"I said to my brother that it's like coming back to school after the summer holidays. To see your friends is one of the best things in your life."
Summer transfer window - key dates and times
The summer transfer window closes at 11pm on Monday October 5 with a feast of activity lined up on Transfer Deadline Day on Sky Sports News and across our Sky Sports platforms.
A domestic-only window for deals between the Premier League and EFL then runs from October 5 and closes on Friday October 16 at 5pm. Follow all the news and analysis on SSN and across Sky Sports' digital platforms, including with our dedicated Transfer Centre blog.