The former Spurs striker has recovered from a serious knee injury that has kept him out of action in Spain since August 2016
Villarreal striker Roberto Soldado has recovered from an injury that kept him out for over six months.
The former Tottenham forward tore the anterior cruciate ligament and the lateral meniscus in his right knee in a friendly against Deportivo La Coruna in August.
He underwent surgery within a few days of the injury but has not featured for Villarreal this season as he fought to get back to full fitness.
The Spanish side have not yet suggested when the 31-year-old will return to training, but he is unlikely to be rushed back after such a lengthy layoff.
Soldado left Tottenham for Villarreal after a disappointing two-year spell in England and immediately formed a partnership with fellow striker Cedric Bakambu, the pair scoring 17 times between them last season.
The Spanish side host Roma on Thursday in the first leg of their Europa League last-32 tie.