Puebla coach on verge of quitting
Puebla are second from bottom of Group Two in Mexico's Clausura championship on nine points from 11 matches and Sanchez said he would resign if they did not beat America at home in the Cuauhtemoc stadium on Sunday.
"In football there is magic, (but) that magic no longer exists in this team. There are good moves, there is commitment and fighting spirit, but the magic is no longer there," Sanchez told a news conference.
"I need the team to recover something, someone to come and smile differently, because the players are also playing for their future in the (championship) run-in," he added.
"I've already told the players and the directors about my decision.
"If we don't win on Sunday I'm off, because in the five matches that follow I don't know how to recover the magic and in my search for it, I'm putting my head (on the block) to get those three points."
Puebla have little chance of finishing as one of the top eight teams that qualify for the knockout phase.