I think that the main reason is that they played really weak teams in previoud round. At least Bulgaria and Serbia played agianst each other 4 times...
I think the main reason is Serbia and Bulgaria has been playing with full roster and main players whole competition and Turkey just used them since 2 or 3 weeks ago.
On the other hand, I hope we'll be able to watch an interesting match tomorrow... I'll cheer up for Bulgaria, because I really want them in GP but probably Serbia will win. On the other match, Tur-Isr, I think if Turkey is gonna play with main team they have to win without problems.