UEFA's chief legal counsel for integrity and regulatory affairs, Pierre Cornu, has arrived in Istanbul to meet Turkish officials and draw information on match-fixing investigation.
Cornu is expected to have meetings with public prosecutor Mehmet Berk and President of Turkish Football Federation Mehmet Ali Aydinlar.
Scores, including players and club officials, have been arrested as part of the match-fixing scandal that rocked Turkish football.
Aziz Yildirim, the chairman of last season's league champions Fenerbahce, and cup winners Besiktas coach Tayfur Havutcu are among those who were jailed pending trial. Turkish Football Federation delayed start of the league until Sept. 9 because of the probe.
Last week, Turkish Football Federation was expected to make a decision on the fate of clubs that were allegedly involved in match-fixing charges, however, President Aydinlar said the federation would wait for prosecutor's indictment.