"He did not play well yesterday."

Translation: Včera nehrál dobře.

[Erlend304345]

why cant you start with nehral?
e.g..
nehrál včera dobře.
nehrál dobře včera.

[VladaFu]

That is a question word order (quite similar to English in fact).

But it is possible here and natural as an answer:

Proč není dnes na soupisce? Nehrál včera dobře.

Why isn't he on the roster today? He did not play well yesterday.

I will add it.

[Erlend304345]

Yes! finally Im good enough in czech to contest the standardized answers

[BoneheadBass]

There are generally many -- sometimes very many -- acceptable answers for each exercise, though only one can be shown at the top of the discussion page. So it usually doesn't hurt to ask about alternatives! :-) It's also a very good idea to use the Report button, if your answer was rejected and you believe it's correct, in addition to asking in the discussions.