The Portugal winger notched his third strike of the campaign by beating Royals keeper Adam Federici with a fine drive during the 2-1 triumph.
Could you name the other players who have found the net as a substitute for the Reds this term?
Check out the answers in the black box and look out for another trivia poser next Thursday.
(v Chelsea A, Aston Villa A x 2, QPR H)
(v Wigan H)
Robin van Persie
(v Braga A, West Brom H, West Ham A)