With Williamstown leading Footscray by 4 points halfway through the third quarter of the 1921 VFA FINAL a massive hailstorm broke out. Within a matter of minutes the entire ground was covered in hail stones, some of which were as large as a two shilling piece. Football was clearly impossible in the circumstances, and the match was abandoned. When the match was replayed a week later Footscray emerged victorious, but Williamstown had finished top of the ladder after the minor round, and therefore had the right of challenge. This was duly invoked, with the Villagers accounting for the Tricolours by three goals.
WEST ADELAIDE Football Club undertook an eastern states tour in 1921 during which matches were played against both Queensland and New South Wales representative sides. West, who finished second from bottom in the SAFL this season, defeated Queensland in Brisbane 18.20 (128) to 10.18 (78), and overcame New South Wales in Sydney 12.24 (96) to 11.5 (71).
Round seven of the 1921 VFL home and away series saw RICHMOND at home to ESSENDON. The Tigers trailed at the main interval by 15 points before making strenuous efforts to turn things around in the third term. These efforts were assisted by a larrikin in the outer, and field umpire Wilkinson. The larrikin got hold of the ball after it landed in the crowd, and punctured it before returning it to the field of play. Essendon full back Bert Day tossed the ball to umpire Williamson so that it could be inspected. To everyone's surprise, Richmond full forward George Bayliss ran in, collected the ball and kicked a goal. Even more surprisingly, the umpire called it "all clear" and the goal was allowed to stand. By three quarter time Richmond had taken the lead by 18 points. The Tigers eventually won 12.14 (86) to 10.11 (71).
Fourth interstate championship series takes place in Perth. Western Australia defeat South Australia and the VFL, latter for first ever time, to emerge undefeated champions in three team competition. WAFL introduce Sandover Medal to be awarded on same lines as SAFL's Magarey Medal. First winner: Tom Outridge (Subiaco). Dan Moriarty (South Adelaide) becomes first and to date only player to win three consecutive Magarey Medals. Glenelg enter SAFL bringing total number of teams in competition to 8. North Melbourne (VFA) withdraw from competition after 8 rounds in failed bid to gain admission to VFL. Grand final results - VFL: Richmond 5.6 (36) d. Carlton 4.8 (32); SAFL: Port Adelaide 4.8 (32) d. Norwood 3.6 (24); WAFL: East Perth 5.9 (39) d. East Fremantle 4.8 (32); VFA: Williamstown 8.9 (57) d. Footscray 5.9 (39); TFL: Cananore 6.18 (54) d. North Hobart 4.5 (29); NTFA: City 8.10 (58) d. North Launceston 7.4 (46); NSWAFL: North Shore 10.7 (67) d. Newtown 7.12 (54); NTFL: Waratahs 6.4 (40) d. Wanderers 5.1 (31); QFL: South Brisbane 12.17 (89) d. Valley 8.11 (59); NWFU: Diggers 7.11 (53) d. Latrobe 4.6 (30); TSP: Cananore 13.14 (92) d. City 8.8 (56); WA State Premiership: Not contested.