A British commando that was captured and brought before Rommel told that Rommel had mused it was too bad they couldn’t ally against the Soviets vs fighting each other.

If you look at post WW2 Europe and even Operation Paperclip, the US and Uk knew quite well the USSR was the next enemy. There was even discussed plans to immediately launch an attack on Soviet held territory, although that never moved anywhere considering how taxing the conflict with the Axis had been.