"In a non-deal scenario without another delay of US tariffs, I see the EU going for a tit-for-tat approach, ie imposing 30% tariffs on selected US goods, not yet all goods, like the well-known motorcycles, cars, clothing and alcohol," he said in emailed comments.

US President Donald Trump put the odds of striking a trade deal with Europe to reduce the tariff rate on their imports at 50-50.