On 28 July, Sevilla announced that Hedwiges Maduro was suffering from a congenital anomaly in his heart. It was detected in a special examination by physicians during the second part of the team's summer concentration in Costa Ballena, near Rota. The club said days after that the player had traveled to Houston, Texas, for an examination and a full diagnosis. Maduro said after the first extensive revisions made in Spain that his life was not in danger. After being investigated in Houston by Dr. Paolo Angelini, Sevilla medical services made public that Maduro's abnormality would not prevent him from playing football professionally, and he could rejoin the squad as normal, in late August.
Trochowski's knee injury
Out between: September 2012 – May 2013
After scoring the first goal of the match against Barcelona on 29 September, Piotr Trochowski had to leave the match with a knee injury. Sevilla's medical services analyzed his illness during the following days. The treatment he received first failed, and doctors thought it was appropriate to operate him in late October in Denver, Colorado. After the surgery, the club told press that the time without playing would be eight months, figuring that his reappearance could be in May 2013, meaning he would miss the remainder of the season.