Import automatically results depend on something that is close a partnership with a company livescore, which would be responsible for providing the results of matches.
Otherwise, any solution that was implemented, the data via XML, or JSON API is picking up, would always be subject to stop working an hour to another if the data source by its developers to be changed at some point.
Therefore, I prefer to have a plugin that can guarantee the operation, although administrators require post the results of the matches manually, than a plugin that could stop working overnight, frustrating the participants of the competition.