The 2005–06 Serie A season for Inter Milan had a single European player on the roster during the Champions League group stages, that of the retired footballer of what nationality? 
2005–06 Inter Milan season:  During the Champions League group stage, the side managed to have a line-up of 11 foreign players on the pitch: the only european was Luís Figo, playing the second time. Luís Figo: Luís Filipe Madeira Caeiro Figo, (] ; born 4 November 1972) is a retired Portuguese footballer.
Portuguese