Germany's foreign minister Anna Baerbock has said she "would not stand in the way" of Poland if it was to send Leopard 2 tanks to Ukraine.
Ukraine has called on the West to provide the German-made tanks which they say will help them defeat Russia.
But Germany is yet to provide the armoured vehicles, and its export laws prevent other countries from sending theirs.
On Sunday, Baerbock said Poland had not yet asked for export permission.
"For the moment the question has not been asked, but if we were asked we would not stand in the way," she told France's LCI TV on Sunday.
Last week, Poland's prime minister Mateusz Morawiecki said the country was ready to provide 14 Leopard 2 tanks to Kyiv if Berlin permitted them to do so.
On Monday, the Polish president's foreign policy advisor, Marcin Przydacz, said he welcomed the announcement, but would prefer to hear Germany's position confirmed by Chancellor Olaf Scholz.
"It turns out that through talks and diplomatic actions, Poland is able to change the German position," Przydacz told Polish Radio.
However, Warsaw ultimately wants Berlin and NATO allies to also send their own Leopards because government officials admit that 14 tanks will have a limited impact on Ukraine's fighting capacity.
The Leopard 2 tanks were specifically designed to compete with the Russian T-90 tanks, which are being used in the invasion.
There are believed to be more than 2000 of them world-wide and Ukraine President Volodymyr Zelensky said about 300 of them would help ensure a Russian defeat.
Many allied countries have become frustrated with Germany over its reluctance to send its own Leopard 2 tanks.
Under current regulations, Germany must also sanction any re-export of its tanks by other countries, such as Poland.
Following a meeting of more than 50 allied countries on Friday, Germany had not yet committed to supplying the tanks nor releasing their export licence. But it denied unilaterally blocking the tanks' export.
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In a joint statement on Saturday the foreign ministers of Estonia, Latvia and Lithuania told Germany "to provide Leopard tanks to Ukraine now".
Why are Leopard tanks so in demand?
By Chris Partridge, BBC weapons analyst
The Leopard 2 tank is a world-class weapon used by more than a dozen countries.
Ukraine sees tanks as another vital part of its defence against Russian forces and Leopards have seen combat action in Afghanistan and Syria.
What makes them particularly attractive to Kyiv is that nearly two-thirds of all Leopards produced are still in Europe. So physically getting Leopards to the fight is relatively straightforward. That also makes maintenance and repair - vital aspects of any weapons system - easier too.
It is worth remembering in all this that Germany is giving Ukraine vital air defence systems, such as IRIS-T and Patriot surface-to-air missiles, as well as armoured personnel carriers.
German Chancellor Olaf Scholz has traditionally been sceptical of German involvement in military conflicts, and concerned about triggering an escalation from Russia.
The chancellor met with French president Emmanuel Macron at the weekend to reiterate the two countries' post-war alliance.
France has already committed to sending light tanks to Ukraine, and Macron suggested it was possible that French-made Leclerc heavy tanks may also be delivered to Ukraine.
Other countries have committed to sending tanks, including the UK, which will send 14 Challenger 2s.a
