Tensorflow install not working (Core dumped)

I've installed tensorflow in ubuntu20.04 LTS, but it has failed.

I'm using a Virtualenv for python3.9, so I use pip command and not pip3

First I upgraded pip, and then I installed tensorflow

pip install --upgrade pip pip install tensorflow 

Then if I open python3.9 and run

import tensorflow as tf 

the error I get is

>>> Illegal instruction (core dumped) 

Any ideas?

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