Semedo was crowned "Charlton's Player of the Year" in May 2011, picking up 43% of the votes in what was the club's worst season for a number of decades. However, manager Chris Powell could not offer him assurances that he would be a key member in the following season, as he aimed to create a more fluid midfield, and so, on 7 July, the player moved to another club in the English third tier, Sheffield Wednesday, again as a free agent.