The Indiana Fever and the Las Vegas Aces are through to the semifinals, having eliminated their respective opponents on Thursday. Indiana pulled off an 87-85 win in Atlanta to enter the second round for the first time since 2015. Las Vegas held on against the Seattle Storm 74-73 for their seventh straight appearance past the first round of the playoffs.The best-of-5 series will begin Sunday in Las Vegas, where the Aces have not lost since Aug. 3. Game 2 will likewise be in Sin City before the series shifts to Indianapolis in Game 3 on Friday.Indiana Fever vs Las Vegas Aces semifinal scheduleGameDateLocationTimeTV scheduleGame 1Sept. 21, SundayLas Vegas3 p.m. ETABCGame 2Sept. 23, TuesdayLas Vegas9.30 p.m. ETESPNGame 3Sept. 26, FridayIndianaTBDESPN2Game 4 (if necessary)Sept. 28, SundayIndiana3 p.m. ETTBDGame 5 (if necessary)Sept. 30, TuesdayLas VegasTBDTBDIndiana Fever won the regular-season series against Las Vegas AcesNobody dominated the WNBA the way the Las Vegas Aces did since early August. From eighth in the standings, the Aces nailed the No. 2 seed in the playoffs by ending the regular season with a 16-0 record. The Fever owns a 2-1 season series edge against A’ja Wilson and Co., but never clashed with the Aces during their late surge.The Fever lost to the Aces in Las Vegas, 89-8,1 in early June to open hostilities. Without Caitlin Clark, Indiana bounced back by annihilating the Aces 81-54 in the rematch in early July. The Fever secured the season series with an 80-70 home win late that month.Classic offense vs defense could highlight Fever-Aces semifinal seriesWith several key players relegated to being cheerleaders in the playoffs, the Indiana Fever turned to their defense to upset the Atlanta Dream. Anchored by All-Star Aliyah Boston, the Fever owned a 93.4 defensive rating, second-best in the playoffs. Boston and her teammates limited the Dream to 28.1% 3-point shooting, a crucial stat against the Las Vegas Aces in the playoffs.Meanwhile, the Las Vegas offense has hummed in the playoffs. They have a 111.6 offensive rating, second in the postseason. Behind Chelsea Gray and Jackie Young, the Aces have been particularly deadly from 3-point distance, making a sizzling 40.0% of their 3s against Seattle.The Aces have the healthier team with a deeper lineup, making the Indiana Fever definitive underdogs. But like in the series against the Dream, the Fever are out to prove an upset is always possible, even in a best-of-5 series.