Don't say:
He played well yesterday, isn't it?

Say:
He played well yesterday, didn't he?

Note:
In this form of question, use the same tense and person as in the preceding statement and use the correct auxiliary if, however, the preceding statement is in the negative form, the question phrase omits not We say : 1 They are on holiday, aren't they? They aren't on holiday, are they? 2 You speak English, don't you? You don't speak French, do you? ....Use the question phrase isn't it only when the preceding statement contains the word is: It is a hot day, isn't it?