Going to be a hard one this, but rumour in England (coming from the solid sources, not the rag papers such as DM and The Sun) is that your club is ready to let him go if he asks to.
Now, if he looks for a top notch contract, then I don't know, chances are 50-50 and I get my hopes up because at Juventus he's on £55,000 per week contract. Chelsea could easily get that up to £130-140,000 per week with absolute ease. If we're ready to spend £50m on him then be sure we're going to offer him huge wages. Imagine that our 2nd GK Begovic (who we've just sold to Bournemouth for £10m) was on higher wages than what Alex Sandro is currently on at Juventus.
But if he has his heart set on Juventus then any bids and contract proposals are irrelevant then.