The NBA and the National Basketball Players Association are struggling to reach an agreement on ending the one-and-done rule to make 18-year-old players eligible for the NBA draft, according to ESPN.

The league wants to add two conditions to ending the one-and-done NBA draft era. NBA commissioner Adam Silver reportedly is pressing NBPA executive director Michele Roberts to force players' agents to give teams medical information on draft prospects, the report says, citing unidentified league sources. The union, however, is resisting.

Additionally, Silver is pushing for the NBA to mandate players attendance and "some level of participation" in the pre-draft combine. 

"We're investing millions of dollars into players who we'll now have even less information about coming out of high school, and we should have the right to have all the information available on who we are selecting," one general manager told ESPN.

The report comes just days after the  G League announced an alternative to the one-and-done route, which will offer "Select Contracts" worth up to $125,000 to top high school prospects who don't want to go down the NCAA's one-and-done route. The prospects have to be at least 18 years old, but not yet eligible for the NBA draft.

Despite the setback, the league hopes to reach an agreement with the NBPA that will allow graduating high school seniors to enter the league starting with the 2022 draft.