The Bayern Munich midfielder was airlifted by helicopter away from his side's training base on Saturday, generating fears that he might miss their first match of the tournament.
However, the coach says that this was at the instruction of Fifa and does not relate to any ongoing concerns over the 29-year-old.
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"We then decided we would wait for a couple of days to see and, in the game against Armenia, he was fine. His knee is fine but Fifa wanted this extra medical check."
Indeed, the coach had further positive news on the injury front, declaring: "As far as [Monday] is concerned, all players will be 100 per cent fit."
Although Low has selected a young squad, veteran Miroslav Klose is on the verge of becoming the World Cup's all-time top scorer and the 54-year-old is hopeful that the Lazio striker can quickly pass the milestone.
"I believe it will be very important for him personally to break the record," he observed. "It is quite extraordinary if you can become one of the best scorers of all time.
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"Whether Miroslav starts or is on the bench, he is very important for us. He is a role model. He has worked so hard, he is also 100% fit. He has not been distracted by the whole hullabaloo surrounding the record or the tournament."
After finishing third in each of the last two World Cups, Low is optimistic that he can once more lead his squad deep into the competition.
"I think we've shown in the last years that we are a team that have a lot of options. If we perform consistently across the tournament, with plenty of passion and commitment, we can very tough to beat," he enthused.