Fiorentina full-back Marcos Alonso to the club.

The Spaniard spent the second-half of the 2013-14 season on loan at the Black Cats making 16 league appearances.

According to the English newspaper the Daily Express , coach Dick Advocaat has asked for a host of new players including Fiorentina target Fabio Borini after a shocking start to their league season in which they have lost their opening two games.

Alonso is also thought to be one of the players the Dutchman has asked for.

The 24-year-old started his career at Real Madrid and managed to make one appearance for Los Blancos as an 18-year-old before being sold to English side Bolton Wanderers.

Alonso made 22 appearances for the Viola last season scoring once and creating three assists.