European stocks were set to open higher on Tuesday, supported by progress in peace negotiations between US President Donald Trump, Ukrainian President Volodymyr Zelenskiy and European leaders. Trump said security guarantees for Ukraine would be provided by European countries in coordination with the US, while Ukraine has offered to purchase about $90 billion in US weapons as part of the deal. Trump also noted that he had spoken with Russian President Vladimir Putin and was working to arrange a direct meeting between Putin and Zelenskiy, followed by a potential trilateral summit among the three presidents. With no major economic data or earnings scheduled in Europe today, sentiment was guided by geopolitical developments. In premarket trade, Euro Stoxx 50 futures rose 0.2% and Stoxx 600 futures gained 0.1%.