By Foo Yun Chee PARIS (Reuters) – The EU antitrust chief defended a deal with Google over how it displays web search results, following criticism from rival firms and his own colleagues, saying there had been no gentlemens agreement to close the case. The worlds most popular search engine has been under investigation for three years by the European Commission, which acts as the blocs antitrust regulator, over complaints it was blocking competitors in search results. More than a dozen companies, including Microsoft, price comparison site Foundem and online mapping company Hotmaps, have accused it of squeezing them out of the market. Earlier this month, Google agreed to make concessions to display rivals links more prominently, hoping to end a case that could have led to a fine of up to $5 billion (3.6 billion euros).