The tech giant has described the Brussels’ antitrust case as “wrong as a matter of fact, law and economics”. Back in April, the European Commission’s competition policy chief launched a full-scale legal attack on the most popular search engine, accusing it of abusing its market dominance by favoring its own shopping price comparison service.

Moreover, the Commission also examines other Google services, including travel price comparison and local directories, as well as considering complaints about the copying, or “scraping”, of rivals’ content and restrictions on advertisers. Finally, the EC started a separate investigation into Android OS, the most popular mobile phone software in the world.

Google responded to accusation in 100-pages submission, which remains confidential. But the company discloses its general idea: far from harming rival shopping price comparison services, Google had actually increased traffic to their websites. Google’s submission also reveals that in recent years hundreds of new price comparison businesses have launched in European markets.

The company argued that the Commission has defined its competitors too narrowly and said that the shopping industry should be regarded as a field including big retailers like Amazon and eBay, which are growing fast instead of being harmed by Google.

Google rejected the Commission’s proposed way of using the advertising box to show products sourced and ranked by other price comparison services, saying that it would be technically difficult to do and would lead to poor quality search results. If Google’s defense appears unsuccessful, the company could in theory be fined up to 10% of the previous year’s turnover.