The World Cup quarter-final line-up is complete.Switzerland became the eighth, and final, nation to progress from the round of 16 as they booked a meeting with holders Argentina in Kansas City on Saturday. They defeated Colombia 4-3 in a tense penalty shootout, after a goalless draw; Gregor Kobel proving the hero with an exceptional save from Cucho Hernandez.A scrappy, even game was dominated by two exceptional defences, and there were precious few chances worthy of the name as both teams wrestled with the weight of the occasion.Our writers debate the big talking points in Vancouver.How did the shootout drama unfold?What the 120 minutes of normal football lacked in drama, the shootout more than made up for.Juan Fernando Quintero and Granit Xhaka traded opening penalties before Colombia central defender Davinson Sanchez, given the right side of the goal to aim for by Kobel, clanged his shot against the crossbar. The ball bounced down onto the goal line but, crucially, was not over it.Zeki Amdouni, off a short run-up, calmly placed the next penalty past Camilo Vargas to put Switzerland 2-1 up, before Jaminton Campaz’s low effort squirmed under Kobel.Manuel Akanji stepped up with the chance to make it 3-2, but again, a centre-back smashed their penalty off target, this time way clear of the bar. We then remained at parity because Hernandez’s shot was brilliantly saved to his right by Kobel.Cedric Itten went down the middle and scored for 3-2 to the Swiss, then Luis Dias made it 3-3, meaning Ruben Vargas had the chance to win it with Switzerland’s fifth and final penalty… and he sent his namesake the wrong way to spark delirious scenes of celebration.It meant Colombia lost on penalties at the last-16 stage for their second World Cup appearance in a row, having done so against England in 2018.Tim SpiersCan Switzerland trouble Argentina in the quarter-finals?Well, these teams certainly stopped each other during what was probably the worst match of the knockout phase so far, and one of the most uneventful of the whole tournament.In 90 minutes, the combined xG (expected goals) figure of both sides was just 0.7, with neither ’keeper seriously tested. It was very 0-0 and extra time looked likely from about the 20-minute mark onwards, owing not just to a lack of individual brilliance in either attack (the injured Johan Manzambi was sorely missed for Switzerland) and also a lack of ambition, but primarily owing to the defensive organisation of the two sides.Switzerland players celebrate their shootout victory (Luke Hales/Getty Images)However, none of that means Switzerland can’t trouble Argentina in their quarter-final in Kansas City on Saturday (early Sunday UK time). Lionel Messi and company may have put six goals (three each) past Cape Verde and Egypt in knockout play so far, but they came perilously close to exiting this tournament in both matches, showing a defensive vulnerability neither team showed here.Switzerland will look to exploit that via Breel Embolo and, they hope, Manzambi, provided he regains fitness. If they can again keep it tight at the back, they’ll have a chance. They’ll certainly be hard to beat.