Theres good cover for both these players for the short term...
Abdullah and Ergun can play in Hakan's position (probably even better than him)...
For the 2 centre back positions, I think Bulent shouldn't play in the next game..
He was too slow for the Brazilians...
Fatih had a great game considering he was on a yellow card right from the start, so I think him and Emre should play in the middle (rather than Emre - Bulent), and Umit Davala can fill in at right back...That will keep Costa Rica's quick strikers at bay, and provide an extra attacking option through Umit
