help with a query

i have data bast that represents basketball teams. and i'm trying to find
one team that has not won yet but has gain that most points during their
games from the other team who have not won yet.

i wrote a query that is checking if a team has not won at all. but i'm
trying to figure out how to count the points because every team play either
at home or away.

thank you for you help.

here is the query the i have wrote so far:
select team.id, nickname,color
from team,points,game
where (team.tid = game.vtid and (vscore - hscore ) < 0) or (game.htid =
team.tid and (hscore - vscore )< 0 )
having