Swansea have completed the £11 million signing of Spanish midfielder Roque Mesa on a four-year deal, the Premier League club have announced.
Mesa, 28, joins from Las Palmas, where he spent seven seasons and helped the Canary Islands club win promotion to La Liga in 2015.
He becomes Swansea boss Paul Clement's third summer signing following Dutch goalkeeper Erwin Mulder and England under-21 striker Tammy Abraham, signed on a season-long loan from Chelsea.
"I'm very happy to be here. It's a new challenge and a new adventure," Roque Mesa told Swansea's official website.
"The manager knows me, he knows how I play and what I can contribute to the team. I'll try to make the team play.
"I know he's like Ancelotti -- he likes to play and wants to create a different Premier League team which likes to play. The manager is a person who knows how to play and that's something I really like."