He arrived in Geneva on the eve of the first meeting between US and Russian leaders since 2018, when Putin met Biden's predecessor Donald Trump in Helsinki.
Biden will try to use the trip to burnish his multilateral credentials after the tumult of Donald Trump's presidency, which left many US allies in Europe and Asia bewildered and some alienated.
Tayyip Erdogan and Joe Biden are due to hold talks at a NATO summit on June 14, their first face-to-face meeting since Biden took office in January.
Given the current challenges caused by the global pandemic, we feel very strongly that this is a time to keep allies as allies rather than focus on differences.