Goals from Cesc Fabregas, Isaac Cuenca, Lionel Messi and Alexis Sanchez improved the title holders’ home record this season to 39 goals scored and none conceded as Barca stayed within three points of leaders Real Madrid ahead of next weekend’s Clasico showdown.
Martinez felt that his players did as well as they could have done against their opponents.
“We wanted to frustrate them for as long as possible but conceded an early goal,” the 47-year-old said in quotes printed by Marca.
“We competed to the end and I felt that the team never gave up.”
The former Cartagena boss congratulated Guardiola, saying of his counterpart: “He took a risk, playing Sergio Busquets [who was one yellow card away from a suspension] and using that line of three defenders.
“You don’t get many chances at Camp Nou,” he continued. “But a side leading 39 goals to zero [at home] is a bit insulting to the other teams.
“They’re a team who monopolise the ball which, in recent years, has won everything.
“We leave with our heads held high, but with five in the bag.”
Barca now face a purely-academic Champions League fixture at home to BATE on Tuesday, having already won their group, and are turning their attentions towards December 10, when they play a potentially-decisive Clasico against Real Madrid, and Martinez expects a close game.
“I am a mere spectator,” he said. “But it seems very level.
“Everyone speaks well of Madrid and they are at home, but Barca never give up and there is a mutual respect.”
Levante, who have defied expectations so far this season and are currently fourth in La Liga, now look ahead to their next match at home to Sevilla, also on December 10.
Starting last month and continuing every Friday through to January, Goal.com will publish extracts from Graham Hunter's highly-anticipated book, Barca: The Making of the Greatest Team in the World. Check out this week's enthralling extract on how Barcelona's path to greatness all started with Spain's triumph at Euro 2008. Don't miss it!