7 Jun, 15:39
ERC can confirm that the Federation Française de Rugby (FFR) has withdrawn its application to host the 2014 Heineken Cup and Amlin Challenge Cup finals, due to the ongoing uncertainty regarding the availability of the Stade de France.
Michalak suffered ankle ligament damage during his club's victory over Narbonne at the weekend and will be sidelined for at least two weeks.
It is a further blow to the defending European champions, who are waiting on the fitness of scrum-half Jean-Baptiste Elissalde.
The loss of the influential French international means that Toulouse coach Guy Noves may move Yann Delaigue to outside-half and Vincent Clerc may switch to scrum-half.
Clerc, capped by France on the wing, replaced Michalak at scrum-half during the match against Narbonne.
"The forwards helped me a lot and Yann was constantly giving advice and talking to me about what options to take," Clerc said.
"If required, I am ready to do it again. I am going to work hard this week so I am ready if needed."