Guillermo Canas is set to make his Davis Cup comeback from a drugs ban after being named as a reserve for Argentina in next month's final.
Canas was suspended in August 2005 after his positive test
Canas has just completed a 15-month ban after testing positive for a banned diuretic found in medicine given to him by staff at the Mexican Open.
World number seven David Nalbandian heads up Argentina's bid to win a first Davis Cup at the expense of Russia.
Jose Acasuso, Agustin Calleri and Juan Ignacio Chela have also been selected.
Canas has won three titles on the challenger circuit since completing his ban in September and has seen his world ranking rise to 214.
The Davis Cup final is being held in Moscow from 1-3 December.