The European Commission has extended the deadline for replying to the charges to August 31 from August 17, a Google spokesman said on Thursday.
This is the second extension for the company, which had originally been told to respond to the Commission's charge sheet, or statement of objections, by July 7.
The Commission, which in April accused Google of distorting web search results to favour its shopping service, confirmed that it had accepted the company's request for additional time to reply.
"In line with normal practice, the Commission analysed the reasons for the request. As a result, it has granted an extension allowing Google to fully exercise its rights of defence," Commission spokesman Ricardo Cardoso said.
Google will not ask for a closed-door hearing to defend its case, said a source familiar with the matter. Some antitrust experts said that such events, attended by senior Commission officials and national competition regulators, rarely yield positive results for companies.
European Competition Commissioner Margrethe Vestager's charges in April escalated a five-year investigation that Google has tried to settle three times without success.
The company could face a fine set at a level sufficient to ensure deterrence if found guilty, according to the Commission's charge sheet seen by Reuters. The EU antitrust authority can sanction wrongdoers up to 10 percent of their global turnover.
© Thomson Reuters 2015
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