The England international has fallen out of favour with boss Frank Lampard having been limited to just 45 minutes of league action.
Tomori, 23, broke into the Chelsea first team last season under their transfer embargo making 15 league appearances.
But the summer arrival of Thiago Silva has pushed Tomori down the pecking order.
And manager Marcelo Bielsa is ready to take advantage.
The Argentine is in the market for a new defender following the long-term knee injury to Robin Koch.
The writer is Alamu Tosin. I have three strong passions in life - football, blogging and movies - in that order. I love spending time with friends talking about the important things in life and hate nothing more than 'authority' and hypocrisy. My personal believe in life is that once an individual sets his/her mind to achieve something, it is totally possible. And oh!, I am a strong Lannister, because I always pay my debt. For writing or fixing gigs, contact [email protected].
