Sony Xperia XZ review camera
Sony's 'Xperia X' family could expand again at IFA 2017. IBTimes UK

Three new Sony Xperia smartphones have leaked online and are expected to be announced at this year's IFA trade show in Berlin. The leaked devices - the Sony Xperia XZ1, Xperia XZ1 Compact and Xperia X1 - would further expand on the Japanese company's flagship range and continue its bi-annual approach for tackling the smartphone market.

The Xperia XZ1 appears to be the leader of the pack based on the early specs, as it is powered by Qualcomm's top-end Snapdragon 835 chipset and 4GB of RAM. The device is also expected to come with a 5.2in Full HD display and a 3,000mAh battery.

The report also lists a Compact version of the Xperia XZ1 which would likely offer the same features and design language as the XZ1 but on a smaller scale.

While the leaked information claims that the XZ1 Compact will have the same chipset and RAM as its sibling, it suggests that the phone will have a 4.6in display with a lower 720p resolution, as well as a 2,800mAh battery.

The final device, the Xperia X1, appears to be a follow-up to the first sub-flagship Xperia X smartphone. The report claims it will house a Snapdragon 660 processor with 4GB of RAM, a 5in Full HD display and a 2,800mAh battery.

While the leak is unverified at this point, Sony's mobile division has a history of unveiling its latest devices at IFA. This year's event is set to start on 1 September, which is just three months after Sony's latest marquee device, the Sony Xperia XZ Premium, is set to release in the UK.

The 4K display-sporting Xperia XZ Premium was announced at Mobile World Congress 2017 and is ostensibly an upgraded version of the Xperia XZ, which was a semi spin-off of the original Xperia X, which Sony hopes you won't confuse with the Xperia XZs - a phone revealed alongside the Xperia XZ Premium that isn't expected to release in the UK - or the youth-targeting Xperia XA1.

Where the Xperia XZ1 fits in this family tree is anyone's guess.