The French attacker is set to take part in Villa's Europa Conference League tie against LOSC Lille.
With the game 2-1 to Villa's favor after the first leg in England, they must now navigate a tough away leg.
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It's always nice to be back in France," Diaby told reporters ahead of the contest.
I started here with Paris Saint-Germain and I've already played against Lille in this stadium.
I'm always happy to be back in this stadium and I hope we'll play a great game tomorrow. I've got some good memories here."