Like it or not we currently don't have the personnel in Europe to just play two central midfield players. We have to go with three in the middle for the second leg. Personally I would go with Frank, Yaya and Ferny with Silva and Navas supporting and Sergio up top. With the pace of Navas we could possibly look to hit them on the counter more so than with Nasri plus I think he is more defensively disciplined at the moment than Nasri. IMO it would be suicide to start with two up front even though we need to score twice at the very least. If we can nick a 1-0 lead with 30 minutes to go then we can bring on the likes of Bony, Nasri and Edin to look for the second