Fabregas also praised former Barcelona teammate Messi and bemoaned Argentina's lack of quality as they have drawn with Iceland and lost to Croatia putting them on the brink of an early World Cup exit.
However, despite their disastrous World Cup campaign, Mascherano has insisted that "the relationship with the coach is completely normal".
Atletico are one of the three teams participating in this year's International Champions Cup (ICC) Singapore tournament and will play English Premier League club Arsenal on July 26 at the National Stadium.
"There are no small teams or bad players in a World Cup, but the road is still long, we have to fight and be very strong".
Messi cut a forlorn figure after the match, but Petit - who was a World Cup victor with France in 1998 - has no sympathy for the experienced ace.
"If we don't say what we think, we're going to get to the game with a lot of insecurities". Could Messi have been thinking about his rival Cristiano Ronaldo, who has dominated the World Cup with four goals in two games for Portugal? "He did against Spain, he did it against Italy. and I told you that it's a pity that he was not scored upon so that they realise that if you screw up at the World Cup, it's a goal".
Mascherano added that "we are aware of all the noise there is and, unfortunately, that does not help anyone".
Meanwhile, midfielder Lucas Biglia acknowledged Argentina's future rests on more than the Nigeria result.
The 31-year-old is spending his summer working as World Cup a pundit for the BBC, and he has been pretty quick to pick holes in Ronaldo's achievements so far in Russian Federation. We faced them in November. Sometimes we have to just cling to something, and in Nigeria's last match, we were already clinging to a miracle.