Germany captain Michael Ballack's right ankle was still too swollen for a scan Sunday, so the examination will not be done before Monday morning.
Ballack will talk with Germany coach Joachim Loew after the scan to decide whether he will join the national team training camp in Sicily or first visit the team's doctor in Munich, the German soccer federation said.
The Chelsea midfielder was injured in Saturday's 1-0 victory over Portsmouth in the FA Cup final.
Ballack's injury has raised concern about the 33-year-old captain's fitness for the coming World Cup in South Africa, but Loew said he was relieved that nothing was broken. Ballack has made 98 international appearances for Germany.
"When we learned the news before the training Saturday, we were greatly concerned," Loew said on the federation's website. "But I am not really worried that he could miss the World Cup.
"The positive news is that nothing is broken. But he is in a lot of pain and his mobility is limited. Surely he won't be able to train for a few days, and we need to see whether he has something wrong with his ligaments."
Germany's incomplete squad has been in Sicily since Friday.
Seven players from Bayern Munich will join the team after next Saturday's Champions League final against Inter Milan. Four Werder Bremen players are on the way to the Italian island after Saturday's German Cup final, which Bayern won 4-0.
Germany opens its World Cup campaign against Australia and also plays Serbia and Ghana in its group.