The two countries should intensify their intensions and plans over the next few months in order to meet UEFA's requirements, Platini told a news conference in Geneva on Tuesday.

But "there is no Plan B," he added, referring to possible additional venues in case the former eastern states fail to put in place the needed infrastructure to host the event.

UEFA spokesman William Gaillard reported that Platini will pay a visit to Poland and Ukraine after Euro 2008 would finish, that will take place in Austria and Switzerland in June.

Gaillard said UEFA's main concern is whether the hotels and transport networks - including airports, Ukrainian railways and roads - will be in a sufficient look to host the hundreds of thousands of fans expected for the event.

"We don't have the intensions of moving it elsewhere," Gaillard told The Associated Press. "We have to do it there, but in order to do that the efforts have to increase."

Gaillard also added that UEFA was doing its best to crack down on illegal ticket scalping online, but that it faced legal constraints.

"In some countries we cannot get a court order that terminates someone from reselling tickets," he mentioned.

Several websites are selling tickets for Euro 2008, with prices for the opening match starting from 640 Euros and the best seats for the final in Vienna going for 4,480 Euro.

Gaillard reported each ticket willhave a number and spot checks may be carried out to ensure that fans acquired them in accordance with UEFA conditions.

He warned that "there's absolutely no guarantee that when you approach a stadium you can enter it" with a ticket bought through unofficial channels.