Free practices are used to test setups, tyres, fuel loads and generally anything that has nothing to do with trying to drive as fast as possible. Therefore, they mean nothing with regards to the actual difference in speeds on the track. 9/10 says that Alonso won't be in the top 5 for qualifying. If he is, then his fuel load will be drastically different. If he manages to outqualify the Ferrari's and McLarens and be on a similar fuel strategy I'll eat my words and hail him as the greatest racing genius of our time.