European Union leaders discussed new proposals from the United States on a trade deal at a summit in Brussels on Thursday, with Commission President Ursula von der Leyen not ruling out tariff talks could fail and saying "all options remain on the table".

E.U. chief Ursula von der Leyen said the bloc was ready for a trade deal with Washington, but hinted at preparations for countermeasures if a July 9 deadline was not reached.

"All options remain on the table," she told reporters following a EU summit in Brussels. "We are assessing it," von der Leyen said of the U.S. proposal. "Our message today is clear. We are ready for a deal.