Sophie Cunningham suffered a knee injury during the Indiana Fever's 99-93 overtime win against the Connecticut Sun on Sunday. The Fever guard’s sister, Lindsey Cunningham, was furious after watching her sibling grimace in pain while clutching her right knee.Lindsey launched a no-holds-barred attack on the WNBA’s officiating standards. She urged the league to shift its focus from fining players for speaking their minds to improving the quality of officiating by making new hires."@WNBA maybe you should focus less on fining players for commenting on your poor officiating & more about hiring officials that are able to call a consistent game and protect your athletes. Pathetic. Praying for you @sophaller," she tweeted.Lindsey Cunningham @LbreezzyyLINK.@WNBA maybe you should focus less on fining players for commenting on your poor officiating & more about hiring officials that are able to call a consistent game and protect your athletes. Pathetic. Praying for you .@sophaller 🙏🏼❤️Sophie Cunningham suffered the injury after Bria Hartley crashed into her right leg while attempting a strong move in the paint. Cunningham was in visible agony as she clutched her knee with her right hand before collapsing to the floor.The medical staff rushed onto the court, while the Fever players surrounded their sharpshooter as concern gripped the franchise. The 3-and-D specialist was helped to the locker room and was later ruled out of the game.Cunningham stayed on the floor for only 10:28 minutes before exiting the game in the second quarter. She finished with zero points after missing each of her three shots from the floor, all of which came from beyond the arc.No update on Sophie Cunningham's injury yetIndiana Fever coach Stephanie White was asked for an update on Sophie Cunningham following the team’s win on Sunday. White revealed that the star guard would undergo an MRI scan on Monday once the team returned to Indianapolis.It has been a disastrous season for the Fever, with their campaign marred by injuries. Caitlin Clark remains sidelined due to a right groin injury with no timeline for her return, while Aari McDonald and Sydney Colson have been ruled out for the season. It remains to be seen how severe Cunningham’s injury is and whether she will return before the end of the season.