Ullrich admitted earlier this year that he had resorted to blood doping during his career with the help of Spanish doctor Eufemiano Fuentes .
Ullrich retired in 2007 having won the 1997 Tour .
Ullrich , who retired in 2007 having won the 1997 Tour , admitted earlier this year that he had resorted to blood doping during his career with the help of Spanish doctor Eufemiano Fuentes .