If Senegal finish runner up, they'll play Nigeria in the next round. Potential to be back for both games if they lose that.
However it is likely they top the group tonight and therefore will play one of the third places teams in the next round on the 29th Jan.
Interestingly both Sarr and Bissouma could meet in the quarter finals.
I think it's best to just have the expectation that they'll both be back for Brighton at home on the 10th Feb.
Regarding Son, if Korea win the group, they'll likely play favourites Japan in the next round (30th Jan) if they finish runner up, they'll likely play Saudi Arabia (30th Jan) so will miss Brentford regardless. However, I could honestly see a Klinsmann managed South Korea lose to either of them and be back for Everton tbh.
Oh right, I see the R16 is 27-30th Jan so maybe they get Nigeria on the 27th for example. then he's back in time for Everton if they lose. Not sure 28-31st is enough turn around for jet lag and training to play Everton but maybe it is.
Ia gree that Brighton is the one to hope for.
SK under Jurgen can def lose to japan. I'd expect them to tbh.