Police in Colombia have launched an investigation into a series of online death threats made against midfielder Carlos Sanchez, who was sent off only three minutes into his country's opening World Cup Group H game.
After the soccer teams' jobs were done in Saransk's Mordovia Arena, Japanese fans got to work cleaning up the stadium, reaching down under chairs and on the ground to pick up litter others had left behind.
Several viral videos show Japanese fans systematically picking up and disposing of trash into plastic bags while donning Blue Samurai jerseys.
The World Cup is always an opportunity for nations to share their own unique approach to the attractive game, celebration in victory and the grief of defeat.
People on Twitter also praised their efforts. The supporters of Japan came with bin bags and cleaned up their part of the stadium. The side has never gone beyond the second round, but fans will be hopeful they can build on a strong start and post their best-ever finish.
Neymar leaves training session with sore ankle
Phillipe Coutinho, who opened the scoring against Switzerland, said Brazil expect to be targeted by opponents. With players like Neymar and Messi under-par, the fear of facing Brazil or Argentina is somewhat lessened.
"Senegal achieved a historic triumph", Argentinian media outlet TyC Sports tweeted.
Colombia are now in real danger of not qualifying for the round of 16, with matches against Senegal and Poland still on the schedule. Thus far, the World Cup has been hard to predict, with some of the best teams falling to underdogs and confounding the experts.
Japan and Senegal will be facing off on June 24.