| Datum | Země | Název, adresa | Pořadatel |
|---|---|---|---|
| 10.4.1998 |  | IVTC 3 - Iowa Vale Tudo Championships 3 Iowa, United States | Iowa Vale Tudo Championships |
| 10.4.1998 |  | M-1 MFC - European Championship 1998 St. Petersburg, Russia, Russia | M-1 Global |
| 10.4.1998 |  | Shooto - Gig '98 1st Kitazawa Town Hall, Tokyo, Japan, Japan | Shooto |
| 10.4.1998 | | VFCC - Virginia Full Contact Challenge 1998 Virginia Beach PavilionVirginia Beach, Virginia, United States | Virginia Full Contact Challenge |