Wilkinson has been named in Toulon's 25-man squad for their Top 14 match against Perpignan on Saturday.
The league fixture is scheduled to kick off just hours after France play Wales in the World Cup semi-final.
England crashed out of the tournament last Saturday with a 19-12 quarter-final defeat to Les Bleus, which could have been Wilkinson's last game for his country.
Toulon have also included Georgian World Cup prop Davit Kubriashvili in their squad for the home clash with Perpignan, who are one place above them in the league.
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