Ursula von Der Leyen said Wednesday that Croatia is ready to join the group of countries using the euro single currency at the start of next year.

The European Commission President said in a tweet that the EU executive branch she heads believes "that Croatia is ready to adopt the euro on 1 January 2023."

The move, should it go ahead, would bring to 20 the number of countries using the euro. But the commission's recommendation must first be approved by member countries, probably in the first half of July.

Joining the single currency, Von der Leyen said, "will make Croatia's economy stronger, bringing benefits to its citizens, businesses and society at large.

"Croatia's adoption of the euro will also make the euro stronger."

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+Additional reporting AP