Argentina's 1-0 defeat by England on Friday makes things difficult for Argentina as they try to qualify for the second round of the World Cup, Argentine coach Marcelo Bielsa said.
"It was obviously a very important match. We did not get the three points we needed so it makes it difficult," he said.
"This was a very tightly fought match. There were some opportunities on both sides and unfortunately we were unable to take advantage of some of the chances we had."
Argentina took three points from their opening game against Nigeria.
Sweden, who drew with England in their opening match, top group F on goals scored after defeating Nigeria 2-1 on Friday. England are second on four points with Argentina third with three. Nigeria are eliminated.
"The next match will be a match for classification," Bielsa said. "We will need to focus on the task in front of us and try to put the sadness of this defeat behind us."
Argentina play Sweden on June 12. England play Nigeria on the same day.