Miguel Layun's move to Sevilla is now official, with the club confirming his loan move from Porto on Tuesday along with the arrival of Roque Mesa from Swansea.
Layun, 29, joins Sevilla on a loan deal with an option to buy, resurrecting a deal that was tabled last summer.
Layun had found minutes difficult to come by at Porto, sparking concerns for Mexico about whether he'd come into the World Cup next summer in top condition.
Meanwhile, Swansea midfielder Mesa has joined Sevilla -- also on loan -- until the end of the season, the Premier League club have announced.
Mesa has made 16 appearances for the Swans since his £11 million summer switch from Las Palmas, his last coming in the 2-1 FA Cup win over Wolves on Jan. 17.
The 28-year-old has not featured in the Premier League since being substituted at half-time in manager Carlos Carvalhal's first game in charge, a 2-1 win at Watford.
Additionally, La Liga strugglers Deportivo La Coruna have signed Danish midfielder Michael Krohn-Dehli from Sevilla. The 34-year-old has inked a deal until July 2019 at Estadio Riazor.
Krohn-Delhi was presented with limited opportunities at Sevilla after returning from a serious knee injury and becomes the first Dane to represent Depor.
ESPN FC writer Tom Marshall contributed to this story and information from PA Sport was also used.