Arsenal have completed the signing of Uruguay midfielder Lucas Torreira from Italian Serie A side Sampdoria, the Premier League club announced on Tuesday.
"The wait is over... it's #TimeForTorreira. Welcome to Arsenal," the North London club tweeted.
"In Lucas Torreira, we have signed a young player who is a very bright talent in the game," coach Unai Emery told the club's website.
"A midfielder with great quality, I have enjoyed watching his performances for Sampdoria in the past two seasons, and we all saw him do very well for Uruguay in the World Cup."
The 22-year-old played all five of Uruguay's World Cup matches in Russia, as they crashed out in the quarter-finals following a 2-0 defeat by France.
Torreira joined Sampdoria in 2015 and made 71 appearances for the Italian club.
"He is a young player already with good experience, but who wants to keep on growing. We welcome Lucas to Arsenal and look forward to him joining us soon for pre-season," Emery added.
Arsenal did not provide financial details of the deal but it was reported last month that the fee agreed would be around 30 million euros.
Torreira will wear the number 11 shirt vacated by midfielder Mesut Ozil. Ozil recently switched to number 10.
