Ubisoft chief executive Yves Guillemot has suggested that that PS4 pre-orders are ahead of Xbox One.
When asked during a financials call on Tuesday whether Ubisoft was worried about Xbox One's commercial performance, Guillemot replied, "Even if the PS4 is in front of Xbox One pre-orders... so we are not worried at all. We think [Xbox One] will be a best-seller as well."
Sony announced in August that more than one million PS4 pre-orders had been placed worldwide. Two months later, analyst Michael Pachter suggested that that figure had risen to around 1.5 million units.
While retailers have reported seeing strong pre-orders for Microsoft's new console, official figures have not been announced.
Guillemot said back in July that Christmas pre-order numbers for PS4 and Xbox One were double that of the launch of PS3 and Xbox 360, citing reports from retailers.
Ubisoft reported on Tuesday a $131 million loss for the first six months of the financial year (April to September), representing a 33 per cent year-on-year decline.
Higher costs, including a $56 million rise in research and development spend, has left the publisher in the red despite a slight rise in year-on-year sales generating $400 million.
PS4 is set for a launch date of November 15 in US and November 29 in Europe and Latin America.