The shot of Eva's dancing alone to music with cigarette and drink in hand (at the beginning of her interlude with Andreas) is seen in Lantana when Jane is first introduced-- also shown dancing in a same manner with cigarette and drink in hand
Anna's dream seems to be an epilog to this and was actually part of its script (both films written and directed by Ingmar Bergman and starring Liv Ullmann and Max von Sydow)