In prepared remarks, big tech CEOs defend themselves ahead of US testimony

Jeff Bezos, Tim Cook, Mark Zuckerberg and Sundar Pichai to be grilled over the dominance in their fields of e-retail, smartphone software, social media and search.

The CEOs of Facebook, Apple, Google and Amazon have defended their respective positions in the global market ahead of the historic testimony before the House Judiciary Antitrust Subcommittee on Wednesday.

The US panel was set to grill Jeff Bezos, Tim Cook, Mark Zuckerberg and Sundar Pichai together over the dominance in their fields of e-retail, smartphone software, social media and internet search.

Cook clarified that the smartphone market is fiercely competitive and companies like Samsung, LG, Huawei, and Google have built very successful smartphone businesses offering different approaches.

In a prepared remarks before his appearance, Cook said that "Apple does not have a