Europe’s top court has ruled Google must pay a €2.4bn (£2bn) fine handed down for abusing the market dominance of its shopping comparison service.The tech giant had appealed against the fine, which was originally levied by the European Commission in 2017.It was at the time the largest penalty the Commission had ever imposed – though it has since been supplanted by a €4.3bn fine, also against Google.Google said it was “disappointed” with the ruling.It brings an end to a long-running case that was first brought by British firm Foundem in 2009, when the UK was still part of the EU.Another of the complainants, shopping comparison site Kelkoo, called the ruling “a win for fair competition and consumer choice” in a post on X.The European Court of Justice (ECJ), which made today’s judgement, said in its ruling the Commission was right to find Google’s conduct “discriminatory” and its appeal “must be dismissed in its entirety”.It ordered Google and owner Alphabet to bear their own costs and pay the costs incurred by the European Commission.In a statement, Google pointed out it had made changes in 2017 to comply with the European Commission’s decision.”Our approach has worked successfully for more than seven years, generating billions of clicks for more than 800 comparison shopping services,” it said.Anne Witt, professor of law at EDHEC Business School’s Augmented Law Institute, said it was “an important judgement”.”This is bad news for Google, which has exhausted its legal remedies in this case,” she said – while pointing out there could be further problems ahead for the firm. “Several follow-on actions by injured parties claiming compensation for losses suffered as a consequence of Google’s anticompetitive conduct are already pending in national courts.”On Monday, Google was taken to court by the US government over its ad tech business – it has been accused of illegally operating a monopoly. That trial is ongoing.Last week, UK regulators provisionally concluded Google used anti-competitive practices to dominate the market for online advertising technology.The EU’s case against Google started with Foundem, which filed its complaint against the tech giant in 2009.At its heart was the contention that Google made its own shopping recommendations appear more prominent than rivals in search results.Google had tried to argue that the case had no legal or economic merit.But seven years ago, the Commission agreed that the tech giant effectively monopolised online price comparison by preventing others from getting a foothold in the market.That decision has now been upheld.Industry insiders have been keeping a close eye on the EU case, with suggestions that its outcome may illuminate the direction of travel of the many other antitrust cases Google is currently facing from the European Commission.The search giant has amassed fines of €8.2bn from the Commission, which has repeatedly alleged it abused its dominant market position. These are:2017: €2.4bn fine over shopping results2018: €4.3bn fine over claims it used Android software to unfairly promote its own apps2019: €1.5bn fine for blocking adverts from rival search enginesThe EU is also currently investigating the firm over whether it preferences its own goods and services over others in search results, as part of its Digital Markets Act. If it finds Google guilty, the firm could face a fine of up to 10% of its annual turnover.It is far from the only clash between the EU and big tech.In a separate judgement today, the ECJ has told Apple it must pay back €13bn (£11bn; $14bn) in unpaid taxes to Ireland.