His 57th-minute penalty pulled Newcastle level then Emre won the match with a stunning winner.
Roeder: "I could not be more pleased. He certainly showed he knows how to score a penalty. It is only a matter of time before he shows everybody he knows how to finish in open play.
"He had a goal taken off him against Portsmouth, which we all know now was a poor decision, and there have been a few incidents recently - he hit the crossbar at Middlesbrough and again tonight with a tremendous header.
"He has just not quite had the breaks he deserves, but it is starting to come and if he can pinch some goals in the next few games, that will give him even more confidence.
"But I am sure the celebration we saw tonight, we will see many more times."
Sir Bobby Robson once said he would copy Lomana Lua Lua's celebration if ever he won Newcastle a cup. To which Alan Shearer replied: "I'd pay money to see that!"