The Defence Secretary said: "We've seen the calls from President Trump overnight and we all want to see a durable peace and no return to conflict and aggression - and let's not forget, Russia remains a threat well beyond Ukraine.
John Healey, who made the comments as Nato defence ministers met in Brussels this morning, said Russia remains a threat "well beyond Ukraine".
Responding to Mr Trump's comments, Mr Healey said Nato's job is to "put Ukraine in strongest possible position for any talks".
"So my message in these discussions will be that there can be no negotiation about Ukraine without Ukraine and Ukraine's voice must be at the heart of any talks.
In a clip to camera last night, Mr Trump said he had agreed with Russia's leader to "work together, very closely" on bringing the three-year conflict to an end in phone conversation that lasted more than an hour on Wednesday.
