Syntax

Syntactic actants

Actant 1: whose tears they are
(a) Genitive
(b) Possessive
Стоит ли обращать внимание на слёзы ребёнка! A child's tears are nothing to worry about.
Вошла мать, и Петины слёзы тут же высохли. As soon as his mother came in, Petya's tears stopped.
NB When the word слёзы functions as a subject and does not have a descriptive modifier, the construction слёзы у + Genitive is often preferred to (a) and (b), above:
Слёзы у девочки были крупные и прозрачные. The little girl's tears were large and clear.