Sheffield Wednesday let go of Jose Semedo last summer, but he has kept tabs on their recent results.
The pair spent six and three years at Sheffield Wednesday respectively.
Eight players were either sold or released by Sheffield Wednesday in the summer.
Carlos Carvalhal cannot get hold of Millwall target Jose Semedo to discuss a return to Sheffield Wednesday.
Rotherham United should look to sign free agent and former Sheffield Wednesday midfielder Jose Semedo as they prepare for life in League One.
Lee Bullen has hinted there could still be a future for the popular midfielder at Sheffield Wednesday.
Sheffield Wednesday are set to re-shape their squad ahead of another season in the Championship.
Sheffield Wednesday have a number of players whose permanent contracts expire this summer.
The 31-year-old agreed a new one-year deal with Carlos Carvalhal's side.
The 31-year-old struggled for game-time for the Championship club last season.