Sporting CP have confirmed that Joel Campbell has joined on a season-long loan from Arsenal.
Campbell will join up with Jorge Jesus' side ahead of their match against Porto next weekend.
Despite making 30 appearances in all competitions for Arsenal last campaign, the Costa Rica international has been sent on loan for a fifth time following spells with Lorient, Real Betis, Olympiacos and Villarreal.
The 24-year-old has made only 11 starts in the English top flight since signing for Arsene Wenger's men back in 2011.
"I came to be champion! And to make the best of impressions and repay the trust that was placed in me," Campbell told Sporting's official website.
"It is true that I talked with Bryan Ruiz, who spoke highly of the club. However, it was the support given by the president and the coach that made my decision.
"I promise a lot of work. I know what I can do and I hope everything goes well."