Italy have 11 players walking a disciplinary tightrope when they face Germany in the Euro 2016 quarter-finals, while a Wales quartet may have to watch their step.
With the Euro 2016 quarter-finals upon us, 45 players know they are only one mistimed tackle or act of petulance away from sitting out the semi-finals, should their nation reach the final four.
Thomas Vermaelen (Belgium), N’Golo Kante, Adil Rami (both France) and Thiago Motta (Italy) have already collected a couple of cautions and will miss their quarter-final matches.
After this round, however, the slates are wiped clean as UEFA will not carry forward single cautions into the semi-finals.
These are the players who are one booking away from a suspension:
Poland v Portugal
Poland: Kamil Grosicki, Krzysztof Maczynski, Sławomir Peszko, Lukasz Piszczek, Michal Pazdan, Artur Jedrzejczyk
Portugal: William Carvalho, Pepe, Ricardo Quaresma
Wales v Belgium
Wales: Ben Davies, Aaron Ramsey, Neil Taylor, Sam Vokes
Belgium: Jan Vertonghen, Thomas Meunier, Axel Witsel, Marouane Fellaini, Michy Batshuayi
Germany v Italy
Germany: Jerome Boateng, Mats Hummels, Sami Khedira, Joshua Kimmich, Mesut Ozil
Italy: Andrea Barzagli, Leonardo Bonucci, Gianluigi Buffon, Giorgio Chiellini, Daniele De Rossi, Mattia De Sciglio, Eder, Lorenzo Insigne, Graziano Pelle, Salvatore Sirigu, Simone Zaza
France v Iceland
France: Olivier Giroud, Laurent Koscielny
Iceland: Kari Arnason, Birkir Bjarnason, Johann Gudmundsson, Aron Gunnarsson, Hannes Halldorsson, Birkir Sævarsson, Kolbeinn Sigthorsson, Gylfi Sigurdsson, Ari Skulason