The Group A match is likely to determine who finishes second because Germany, with 15 points from five games, are favourites to top the table.
Belgium are second with 10 points from six games and Turkey (nine points from five) occupy third spot, with both teams scrapping it out for a likely play-off berth.
"Me and my team, we think of nothing but the Belgium game right now," Dutchman Hiddink said in an interview with the Hurriyet newspaper. "This is a key game.
"Nobody has knocked on my door yet, there is nothing concrete to discuss. My contract with the Turkish football federation is until 2012.
"It's not that easy to just leave and go away. Neither me, nor the football federation, has received any official offers." Both sides are without key midfielders - Hamit Altintop and Nuri Sahin for Turkey and Marouane Fellaini for Belgium.
"They (Turkey) have reasonably attacking full backs so there might be some space at the back," said Leekens.
"We will go into the match with the aim of scoring twice. We must also not panic if we go behind."
"I'm used to playing important matches for my club but with Belgium that's different. It is a long time since we had a match as important as this one," said Arsenal defender Thomas Vermaelen.
"The Turks are practically ready to die for their country but a victory is an absolute must for us."
