Outside attacker Emily Spencer — who was named Summit League Player of the Year on Thursday — had a match-high 24 kills against Oakland. In addition, middle attacker Jessie Manwaring had 16 kills, while outside attacker Hailie Ripley added 12 kills.
Oakland in the loss out-hit IPFW .203 to .196. However, the Mastodons (24-6, 12-4 Summit League) held the Grizzles to a match-high .050 attack percentage in the fifth game and opened the decisive game on a 7-0 run.
Libero Tessa McGill also had a match-high 27 digs to help give IPFW the win after losing to Oakland (16-13, 9-7 Summit League) twice during the regular season.
With this victory, IPFW will advance to play in-state rival IUPUI in the conference tournament championship match at 8 p.m. Saturday. IUPUI (22-9, 13-3 Summit League) swept Kansas City in the other semifinal match Friday.
The winner of the Summit League Tournament championship match will receive conference's only automatic bid to the 64-team NCAA Tournament.
IPFW has not appeared in the NCAA Tournament since 2009.