A hacker has breached the Twitter accounts of several football players, including Barcelona pair Dani Alves and Javier Mascherano.
The problem arose during Wednesday night's Spanish Super Cup.
The hacker, who calls himself Padorowsky, said before the start of the match at Real Madrid's Santiago Bernabeu stadium he would access Alves' account.
Padorowsky also appeared to access the accounts of Manchester United goalkeeper David de Gea and Manchester City striker Sergio Aguero, who deleted the messages and wrote "someone hacked my account ... and wrote stupid things."
Alves, who did not play because of injury, was the leading vote-getter after Padorowsky allowed visitors to his website to choose between the Brazil fullback, Dos Santos, Mexican player Rafael Marquez or 'other' as the target.