There was no need to make any unenforced changes to the starting 11 which won last week. In my opinion, you should never change a winning team unless you have good reasons to such as injuries, suspensions, fatigue.
With Olsson in ahead of Chester, Tony obviously trusts Olsson to do the job required whereas Chester has yet to play for us at centre back so whether he fits into Tony's defence methods is yet to be seen. Tony is basically playing it safe by putting in Olsson.
Hopefully the team can play like the did last week against Villa and get at least a point against a good Everton side.
With Olsson in ahead of Chester, Tony obviously trusts Olsson to do the job required whereas Chester has yet to play for us at centre back so whether he fits into Tony's defence methods is yet to be seen. Tony is basically playing it safe by putting in Olsson.
Hopefully the team can play like the did last week against Villa and get at least a point against a good Everton side.