"That tells you that as long as he keeps the standards, he will score lots of goals for Swansea City.
"Some of his play and movement off the ball was outstanding."
Swansea now face a trip to Craven Cottage for the replay on Tuesday, 24 February.
But Martinez fears his side may have missed their chance to knock their second Premier League side out of the FA Cup this season.
"It was probably the best chance we had with the chances we created," said Martinez.
"With the performance, we were the better side and when you do that, you need to win football games.
"We controlled the whole game and we limited Fulham to very, very little.
"We conceded a poor goal. It came in a crucial moment, but the way the players reacted is probably the biggest positive that I'm going to take from the performance.
"Fulham are a very good side and if you look at their record at their place, they are going to be favourites, and in that respect, it's going to be difficult for us."
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