World Cup knock out matches to watch out: Friends, foes, tears and joy

Argentina's Lionel Messi get tackled by Nigeria's Ahmed Musa from the back. [Photo/Courtesy]

Curtain falls on the World Cup group stage matches in Russia. But one thing for sure is that the German machine is gone, done and dusted with the tournament.

As Europe and the rest of the nurse try to fathom the German exit, more heartbreaks seem to be on the way.