Kante has been injured for a month. Chelsea will be curious about how strong he will be able to play from now on. If this injury affects his performance badly then Chelsea might not think of extending his contract. Kante has always been an important part of this team so far. However they can find a solid alternative to him too in the end. Kante will need to convince them not to do so by his effort. Normally I don't doubt him but this injury period has been quite long. Let's see what he can do after his return on September 15.
Kante is a very good player, I mean his contributions in the team day in and day out has been marvelous, what baffles me most is his work rate, like Kante is like the engine box of the the midfield. I believe his presence is greatly missed and so far the available option - Jorginho have not been good enough and reliable so they will be looking to get a replacement probably in January to fill in for Kante.