GENEVA — Fresh from supportive summits with allies, Joe Biden declared himself ready Tuesday to take on Russia’s Vladimir Putin in far more confrontational talks — a climactic finish to the most important week of meetings in his young presidency.

Biden meets for his first talks as president with the Russian leader on Wednesday, in what’s expected to be roughly a half-day of discussions between the two leaders and aides behind closed doors. That’s after spending much of a weeklong European trip — the foreign policy highlight of his presidency so far — working to strengthen ties with like-minded partner nations in order to better deal with rivals Russia and China.

In line with the chilly-so-far Biden-Putin relationship — Putin’s government responded with indignation earlier this year after Biden said he considered the Russian a “killer” — the two men plan neither lunch nor dinner together, and no joint press conference after, in what’s expected to be their four to five hours together.

That’s in contrast to this week’s G-7 session hosted by British Prime Minister Boris Johnson, where the allies and their spouses held a beach barbecue and round after round of “family photos.”