 In August 2010, Tziolis moved to La Liga side Racing Santander on a one-year loan deal.In October 2010, he suffered a leg break in his nation's 1–0 win over Latvia and Racing Santander announced that the period of recuperation would be between four and six months.After a successful league campaign in the second half of the season Racing Santander signed him permanently from Siena for an undisclosed fee.