Uniao Barbarense fielded two players with the same number in the second half of their match against Linense in a deliberate attempt to confuse their opponents.
Midfielder Britto, who wore the number seven shirt in the first half of Wednesday's Paulista (Sao Paulo state) championship match, returned from the halftime break with the number five, the same as defender Rafael Silva.
The referee only noticed the ruse 26 minutes later when he ordered Britto to change his shirt and gave him a yellow card.
"They were on the attack and we used all the tricks we could to keep them at bay," Britto, who finished the match wearing number 17, told the Sportv cable channel after Barbarense's 3-2 win. "It was a strategy and it worked."