Dejan Lovren suffered an abdominal injured in training with Croatia, which means that the stretch of bad medical luck for Liverpool players on international duty has continued into another month. It's unclear how much time Lovren will miss, and he'll fly into Merseyside to be assessed by Liverpool's medical team in the coming days.
Coupled with Mamadou Sakho's injury, Lovren's setback creates a dire situation for Liverpool's back line. Martin Skrtel is the only first choice caliber center back at full fitness, and so Kolo Toure might force his way into the team in the short-term.
Liverpool chose to sell Daniel Agger and loan out Andre Wisdom over the summer with the belief that two of Sakho, Lovren, and Skrtel could maintain health over the course of the whole season, which in hindsight looks like a poor decision.
However, Sakho's injury isn't too serious and it's still possible that Lovren will be healthy ahead of the match against QPR. And in an emergency situation down the road Liverpool could always look to Emre Can to play center back (once he returns to fitness) as he's already played in that role for Germany on multiple occasions.
This international break was supposed to be a chance for Liverpool to get healthier, and that plan seems to be flying out the window already. Best case scenario is that this is just a false alarm, otherwise it'll be Kolo Toure time, which is lots of fun.