LONDON — European stocks are expected to fall at the start of the new trading week on fears that a re-escalation of U.S.-Iran tensions over the weekend could derail the fragile ceasefire between the two countries.

The U.K.’s FTSE 100

index is seen opening 0.34% lower, with Germany’s DAX

down 1.1%, and France’s CAC 40

and Italy’s FTSE MIB