European stocks were set to open lower on Tuesday as investors exercised caution ahead of the approaching August 1 deadline for finalizing trade agreements with the United States. U.S. Treasury Secretary Scott Bessent issued a warning that increasing tariffs from August 1 "will heighten pressure on these countries to negotiate more favorable agreements." In Europe, attention shifts to corporate earnings, with significant reports anticipated from SAP, UniCredit, and Poste Italiane. Meanwhile, no major economic data releases are scheduled for the day. In premarket trading, Euro Stoxx 50 futures declined by 0.5%, while Stoxx 600 futures also fell by 0.3%.