Tuesday belonged to the back lines. Six matches across five continents ended with one side keeping the opposition off the scoresheet entirely, a reminder that for all the headlines grabbed by attackers, it's the teams who shut the door that collect the points.
Cluj run riot in Romania
CFR 1907 Cluj delivered the day's most emphatic performance, dismantling FC Voluntari 5-0 in the Superliga. The hosts were clinical from the first whistle, turning territorial dominance into a five-goal margin that left Voluntari chasing shadows. It was the kind of result that sends a message to the rest of the division: Cluj's defence is locked, their attack sharp.
Ludogorets and Rosenborg cruise
Elsewhere in league action, Ludogorets made light work of their trip to FK Dunav Ruse, winning 2-0 in the Parva Liga to extend their grip on Bulgarian football. In Norway's Eliteserien, Rosenborg BK put four past Fredrikstad FK without reply, while Poland saw Zagłębie Lubin edge Piast Gliwice 2-0 in the Ekstraklasa.
Brazil's Serie B added to the theme as Clube De Regatas Brasil blanked Vila Nova FC 2-0, another controlled performance built on defensive discipline.
Venezia shock Galatasaray
The most surprising result came in a friendly, where Venezia travelled to Istanbul and silenced Galatasaray 3-0. Pre-season or not, a three-goal margin on Turkish soil is a statement of intent from the Italians, who defended with concentration and punished every lapse in front of goal.
Six matches, six clean sheets, zero room for error. Tuesday's winners all shared the same script: defend first, strike second.