Napoli coach Rafa Benitez hailed the battling qualities of his side after seeing them edge out Marseille in Europe.
The Serie A outfit headed into Tuesday's UEFA Champions League clash on the back of a disappointing 2-0 domestic reversal against Roma.
Benitez was looking for a positive response in continental competition, and saw his players deliver on French soil.
Duvan Zapata, who stepped off the bench to replace Gonzalo Higuain, netted what proved to the winner, with Napoli now level on points with Arsenal and Borussia Dortmund in a keenly-contested Group F.
Benitez told Sky Italia: "I'm delighted with the win.
"Duvan? He always does good things in training. Higuain couldn't play the whole match.
"Before the match I saw the concentration of my side. My players have done a good job. We all got together in this result.
"The loss against Roma meant we needed a reaction.
"Winning today puts us in a good position in the standings. We still have two games to come at home and one away. We will see what happens."