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.