I think he can, Ronaldo hasn't played for another champion league side at the start of the season so that won't be a problem. I have seen clubs make use of their January signing to play games in the champions league and that's what signing Ronaldo's will be like. If Ronaldo's knew he can't play then he won't be looking for a champion league team. Reporters of Chelsea striker Broja having possibility to miss the whole season is circulating and this means Chelsea needs a striker to back Aubameyang up.

Having to circulate between Ronaldo and Aubameyang would be awesome as both are experience strikers that can get us goals when we need them. Chelsea needs to be serious in his round of 16 stages, we shouldn't start this the same way we started the season or we'll be knockout very early. Dortmund attack are scoring lots of goals in their game meaning our defense needs to be fully fits to be able to stop Dortmund.