Original sentence: Fierce rivalries between ultra groups can be found all over the world, although most of the larger rivalries are found in Europe and South America.In The Netherlands, the rivalry between Feyenoord and Ajax ultras often results in fighting.Juventus,  Inter vs.Lazio, Torino vs.Milan), and some rivalries are based on politics in addition to team difference.Roma vs.Sometimes ultra groups try to capture banners and flags of a rival groups; losing a banner or flag to a rival group is considered a big humiliation.The rivalries are often based around a basic animosity toward the rival team, mostly in derbies (e.There have also been rivalries between ultra groups that support the same team; based on personal and/or leadership disputes
Edited sentence: As one example, in Holland the rivalry between Feyenoord and Ajax ultras is often followed by fighting between the two groups.Feuds between these "arch-rivals" will often prove more intense than normal.Fierce rivalries between football clubs and its Ultra groups can be found all over the world, though most of the larger rivalries are to be found in Europe and South America.However, it is also possible that rivalries arise from isolated incidents.It is also common for there to be a "arch-enemy" groups from other clubs, usually dating back a long time.Losing a banner or flag to a rival group is considered a big humiliation.Rivalries are often based around a basic animosity toward the rival team, mostly in derbies (Roma - Lazio, Torino - Juventus, Inter - Milan, Sampdoria - Genoa, etc), others exist due to politics.Rivalries between Ultra groups in Italy, and to some degree between cities in general, have a long tradition.Some rivalries might also happen between groups of the same club, either by disputing the capo of the group or when one of the groups is a splinter group.Some times groups will try to capture a banner or flagof a rival group.The group that loses the banner or flag is sometimes disbanded as a last act of honour