Pep Guardiola says "everything could happen" in Wednesday evening's Champions League semi-final second leg meeting of his past club Barcelona and future side Bayern Munich.
Guardiola, who left Barca last summer after four trophy-laden seasons at the Camp Nou to take a year's sabbatical from football, has agreed to replace current Bayern boss Jupp Heynckes at the Allianz Arena for next season.
The Catalan coach kept a low profile before and after the Bavarian's crushing 4-0 first leg victory last week, a result which most expect ensures they will progress safely to the final, but he told a conference in the Colombian capital Bogota on Tuesday that nothing had yet been decided.
"Two fantastic teams are playing, everything could happen," Guardiola said in comments reported in AS. "They are two teams who have had an extraordinary domination of their leagues, what they have achieved this season is well deserved. I am very impatient [to see the game], but I am very bad at making predictions."
Guardiola said he had watched this week's other semi-final return game - in which Borussia Dortmund progressed 4-3 on aggregate to May 25's decider at Wembley despite Real Madrid's 2-0 victory in a thriller at the Estadio Santiago Bernabeu.
"It was a very exciting game," he said. "The difference after the first leg was very large. But with Real Madrid, at the Bernabeu, you can never say it is over until the referee blows the final whistle. I say that from experience."
The Bundesliga had proven its strength this season, Guardiola said, but Spanish football remained on top for now.
"I believe that German football has been very interesting this year," he said. "But Spanish football, thanks to two really important people like Luis Aragones and Vicente del Bosque, have reached such high levels.
"The Premier League is always among the top three, Italy has dropped back a little. In some countries the economy has had an effect. But sometimes it is normal that things change and we must wait and see what time brings."