"Today is essential, we'll have to see how he's evolved, how he's improved," coach Argentina Alejandro Sabella said on Saturday when asked to rate his chances of playing.
"After today's practice, I will have a better idea," he told reporters before Argentina's training session at the Maracana in Rio de Janeiro where they face the Germans on Sunday.
Most pundits think, however, that the best Di Maria can hope for is a place on the substitutes' bench with a late appearance if needed.
At least forward Sergio Aguero's full recovery from a muscle strain has given Argentina a boost in their bid to win a third World Cup, and on the home soil of their greatest rivals Brazil.
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