I was thinking the same. First thought was we'll try to save him from international games because of "injury" .I'm not convinced its a bad one. Shaw looked surprised at being subbed, and didn't seem to be having issues with his mobility.
I really do think Ole plans to use him as a LCB is a back 5 on a regular basis, and we have just been waiting on Telles to get up to speed before using it more regularly. LCB should be way less physically demanding too so we'll hopefully see a reduction in these muscular issues.
It will be a terrible loss because one thing is for sure, after Covid Telles is not playing 90min games packed in tight schedule.