Google-owner Alphabet faces a massive lawsuit in Europe.
It's being sued by price-comparison firm PriceRunner for around $2.4 billion.
The Swedish company alleges the tech giant manipulated search results.
PriceRunner wants Google to pay compensation for profits it claims it has lost in the UK since 2008; and Sweden and Denmark since 2013.
A Google spokesperson said the company would defend the lawsuit in court.
It claimed changes made to shopping ads five years ago have worked successfully.
It also said PriceRunner chose not to use shopping ads on Google, so may not have seen the same successes as others.
But PriceRunner said it was ready to fight for years, with financing in place and steps prepared in the event it does not win.
In November Google lost an appeal against a fine of over $2.7 billion imposed by the European Commission in 2017.
It found that the search giant used its own price comparison shopping service to gain an unfair advantage over smaller European rivals.
The seven-year investigation came about due to complaints that Google distorted internet search results in favour of its own shopping service.
PriceRunner is currently in the process of being bought by payments firm Klarna.