Conversation so far:
How old as he at national team apperance?
15.
Are there any other interesting aspects about this article?
1984 Summer Olympics were Petrovic's first competition of a grand scale with the Yugoslav senior national team.
What place did they get?
Third.
when did he do university games?
The University Games, held in Zagreb in 1987.

Question: who did they lose too?
Self-contained rewrite: who did Dražen Petrović's team lose to at the University games held in Zagreb in 1987?