Despite the backing, UEFA warned the joint hosts to speed up their preparations, insisting the hosting deal could still be annulled, sources from European soccer's governing body said Friday.

Poland and Ukraine were given the reprieve after UEFA's executive committee met in Bordeaux to discuss a progress report on preparations for the tournament.

"The executive committee reconfirmed UEFA's commitment to organize Euro 2012 in Poland and Ukraine," UEFA president Michel Platini told a news conference in Bordeaux. "At the same time, the committee stressed a number of conditions must be met in order to bring forward the whole project."

Platini said the co-hosts "promised" that stadiums in Kiev and Warsaw would be ready in time.

Poland football chief doubts Poland's readiness

Inadequate stadiums, problems with transport systems and not enough hotel beds had given rise to serious concerns and pushed UEFA into a corner.

Several contingency plans had been touted prior to Friday's meeting, such as using Germany as a third, supporting host, or -- as the president of the Polish soccer association, Michal Listkiewicz, suggested -- that Poland and Ukraine's 2012 hosting rights be rescinded in favor of another country, and that the two nations instead plan to host the tournament in 2016.

Listkiewicz seems far from convinced his country will be ready in four years time. The biggest problem: poor infrastructure and terrible traffic, he said.

"If the European Championships took place in 2016, we would have no problems about being ready then," Listkiewicz told Die Zeit Online, the Internet platform of the weekly newspaper.

"But realistically we are looking at having no good roads in time for 2012," he said. "From Gdansk (in Poland) to Donetsk (in the Ukraine) is more than 1,500 kilometers (930 miles). This is not like in Austria and Switzerland where everything lies close together."

Moreover, he cast doubt on whether Poland's partners in Ukraine will be up to the job.

"If things don't go well now, and UEFA has another suggestion, then that would be in order," he said.

2016 Euro expansion

Also to come from the Bordeaux meeting was an announcement that as of 2016, the European championship finals would be played in an expanded format, seeing 24 teams participate instead of the current 16. The decision was reached unanimously by the 13-man committee.

The expansion would also see Euro 2016 become a 51-match tournament -- rather than the current 31-match format -- played over four weeks rather than the current three.