The Colombian paid tribute to the efforts of coach Luis Castro after scoring the only goal to inflict a first defeat on Jorge Jesus' side in 27 matches
The Colombia interntional rose highest to power home a header in the first half of his side's Taca de Portugal
semi-final first-leg on Wednesday as Porto stole the bragging rights in the latest Portuguese Classico.
Benfica had not lost a game since their Champions League defeat to Olympiakos during the group stage, and with Portugal's giants set to face each other in the league, league cup and second leg of the semi-final - as well as a possible meeting in the Europa League last four - Martinez knows the importance of the result.
"We know Benfica are very strong. We had to begin decisively and put into practice what we had been working on," he told Sport TV. "We're all doing a great job, the coach above all.
"Benfica did their bit. but we played a great game. We fought, we ran and we helped each other. When it's like this, the victory has a special flavour.
"Now we have to think about the next game. The 1-0 gives us an advantage but we have to prepare for the second game as well."
Porto face CD Nacional on Sunday before their Europa League encounter with Sevilla next week, with the second leg of the cup clash set for April 15.