Microsoft's Phil Harrison has revealed the company isn't concerned by Sony's strong start with the PS4, saying this console cycle is "a marathon, not a sprint".

Speaking to VentureBeat , Harrison explained that the company wasn't worried by the fact PlayStation 4 sales have passed the 6 million mark , despite us not having an update on Xbox One sales since they hit the 3 million

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"We're happy with our plan," he said. "We're happy with the performances of our key franchises and key partnerships, most notably Titanfall in the last couple of weeks."You can see independent surveys and studies showing our sell-through doubling in the UK as far as hardware," in reference to the news earlier in the week that Respawn's shooter caused Xbox One sales in the UK to almost double Harrison also said that the imminent launch of the console in 26 new territories this September would naturally see sales figures shoot up.Other interesting facts revealed in the interview include how much use Xbox One owners are getting out of their new consoles; according to Harrison, the typical user is racking up more than five hours a day with the device, presumably making use of the TV streaming functionality alongside gaming.

Luke Karmali is IGN's UK Junior Editor. You too can revel in mediocrity by following him on Twitter