How it will be...
Edson Álvarez will police the midfield with the dreary persistence of a civil service audit. He will snuff out counter-attacks before they cross the halfway line, resorting to tactical fouls if necessary. Conversely, Ronwen Williams will command his penalty area, using his voice to organise a deep, resilient defensive shell.
However, the match could fracture beautifully around the hour mark when the altitude begins to extract its tax. If Mexico crack the lock via a messy, second-ball set-piece, the visitors will be forced to abandon their caution.
This is where the spectacle lies. A desperate South Africa, driven by raw pride, will push forward, leaving vast, empty tracts of pitch behind them. A rapid Mexican counter-attack, exploiting those exhausted legs, could then deliver a final, brutal punch. It is a brave experiment in managing tension.