Michalak retires from Test rugby
Michalak left the pitch with a thigh injury after 11 minutes at the Millennium Stadium.
He said: "It's quite sad to finish like that. I truly thought I'd be able to raise the Cup, and I didn't imagine that I would finish like that, with an injury, which makes it even worse. Of course I'll recover from this injury, but I'll take care of my body and play fewer games per year."
The Toulon player, 33, won 77 international caps and played in three World Cups, in 2003, 2007 and this year. He is under contract with Toulon until 2016.
France lock Pascal Pape, 35, is also retiring from internationals after 65 tests.
Captain Thierry Dusautoir, the 2011 world player of the year, declined to comment when asked on Saturday if he had played his last game for France.
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