MEXICO CITY (AP) — When Javier Aguirre was a player, he believed Mexico’s grueling, year-long training camp ahead of the 1986 World Cup was the key to El Tri’s run to the quarterfinals — matching its best result. As coach of the national team , he is trying to replicate that vintage formula. Unlike most competing nations, which must wait for domestic leagues to conclude before gathering their squads, Mexico began assembling its players more than a month before its opening World Cup match on