Not only did the Milwaukee Bucks lose Wednesday's Game 2 against the Chicago Bulls, they may have lost one of their best players for the foreseeable future too.

Khris Middleton sprained his MCL and will undergo an MRI on Thursday to determine the severity of the injury, Bucks head coach Mike Budenholzer told reporters after the game.

According to Jeff Stotts of InStreetClothes.com, NBA players with a Grade-1 MCL sprain miss an average of approximately 17 days (or roughly 8.5 games). For a Grade-2 MCL sprain (an incomplete tear), players miss an average of approximately 41 days (or roughly 21 games). In other words, this injury could sideline Middleton for quite some time and even in the best-case scenario, he'll likely be out at least two weeks.

Prior to the injury, Middleton was playing really well, with 18 points, 8 assists, 5 rebounds, 5 threes and 2 steals in 33 minutes. He shot an efficient 54.5% from the field, 71.4% from three-point range and 100% from the free-throw line. The Bulls beat the Bucks 114-110, tying the series at 1-1.

This season, the Bucks were 7-9 in games that Middleton missed. Game 3 is Friday at 8:30 p.m. ET in Chicago.