| Boys Tennis Results | 2003 |
| May 24 | | Alton (Sr.) |
| May 24 | | Aurora (West) |
| May 24 | | Bartlett |
| May 24 | | Belleville (East) |
| May 24 | | Bloomington (H.S.) |
| May 24 | | Cary (C.-Grove) |
| May 24 | | Centralia |
| May 24 | | Charleston |
| May 24 | | Chicago (Morgan Park) |
| May 24 | | Chicago (Young) |
| May 24 | | Danville (H.S.) |
| May 24 | | Des Plaines (Maine West) |
| May 24 | | Flossmoor (Homewood-F.) |
| May 24 | | Frankfort (Lincoln-Way East) |
| May 24 | | Glenview (Glenbrook South) |
| May 24 | | Gurnee (Warren) |
| May 24 | | Hinsdale (Central) |
| May 24 | | Hoffman Estates (H.S.) |
| May 24 | | Joliet (Catholic Academy) |
| May 24 | | LaGrange (Lyons) |
| May 24 | | McHenry |
| May 24 | | Mt. Prospect (Prospect) |
| May 24 | | Naperville (North) |
| May 24 | | Oak Lawn (Richards) |
| May 24 | | Oak Park (O.P.-River Forest) |
| May 24 | | Olney (East Richland) |
| May 24 | | Ottawa (Twp.) |
| May 24 | | Peoria (Richwoods) |
| May 24 | | Quincy (Notre Dame) |
| May 24 | | Rock Island (H.S.) |
| May 24 | | Rockford (Guilford) |
| May 24 | | St. Charles (East) |