Keita was in the stands, reportedly due to a locker room row with Stefan Radu on Saturday.
"It was a technical decision. In my view the most important thing is the group, it doesn't matter if you are young, old, experienced or green, you have to respect the group. He will be back from tomorrow and everyone has to prove themselves on the pitch.
"At the end of the day we can only get results by working together."
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