Despite leading their Copa del Rey tie 4-1 on aggregate, the coach calls on his players to concentrate but dismisses any fears over Lionel Messi's run without scoring a goal
The Blaugrana fell 1-0 down in the first instalment of the last-eight tie but recovered to run out 4-1 winners and put one foot in the semi-finals, though the Argentine says that their place in the next round is far from guaranteed.
"These are the games that worry me," the 51-year-old told reporters. "I always have the feeling that the match is thought to be all over when actually you have another 90 minutes ahead.
"The match against Levante deserves all of our concentration as we cannot let our opponent get back in the tie."
Martino is also hoping that his team will make headlines for their on-field performances after the continued controversy surrounding the summer signing of Neymar ended with the resignation of president Sandro Rosell last week.
"The people of Barcelona are still supporting us in the same manner as they have done in recent years," he added. "At the moment the team is playing well and people will come to support us because we are playing at a high level and can offer a good show.
"Hopefully, our good performances can get everybody talking only about football [and not about behind-the-scenes situations].
"These players have experienced very serious difficulties in recent years and this situation has also been difficult," admitted the Barca coach.
The 51-year-old also dismissed concerns over Lionel Messi’s lack of goals in his last few matches.
The Argentina international, who has scored eight goals in 14 Primera Division appearances this season, has failed to find the net in his last three games but Martino is adamant that there is no need for Barca fans to worry about the 26-year-old's form.
"I really do not care [that Messi isn't scoring every match]," Martino declared. "Leo always produces match-changing moments. He is capable of providing four assists in one game and, on another day, he could score a goal to eliminate a rival from a competition.
"He is an important player. I do not care if people are saying he has lost the scoring touch."