European Competition Commissioner Margrethe Vestager, who has accused the world's most popular Internet search engine of favouring its shopping service over rivals' when delivering search results, is considering whether to penalise Google.
Possible sanctions could include ordering Google to change its business practices, as well as a fine of up to 10 percent of its global turnover.
The case has dragged on for more than five years since the EU competition enforcer launched an investigation in November 2010, followed by three unsuccessful attempts by Google to settle the issue with concessions.
Vestager may also scrutinise Google's back-tax deal with British tax authorities following a complaint from the Scottish National Party. Google agreed last month it would pay GBP 130 million ($187 million or roughly Rs. 1,284 crores) to settle tax claims covering a 10-year period, but opposition parties have called the amount derisory.
The sources described Pichai's visit as an introductory meeting. He will also meet EU telecoms chief Gunther Oettinger,a vocal critic of US might in a sector where German media companies have, for example, been lobbying to protect content from online giants.
European Commission spokesman Ricardo Cardoso declined to comment.
Google's Executive Chairman Eric Schmidt met Vestager in March last year but failed to appease her.
© Thomson Reuters 2016