Citing "a person familiar with Ballmer's interest" in the Clippers, as well as another source with knowledge of the bids Sterling's wife Shelly has received, the US financial magazine reported on its website that Ballmer's offer package "is strong."
Shelly Sterling was passed control of the team last week by her husband, who has been banned from the NBA over racist remarks that became public in April.
The club was recently valued by Forbes at nearly USD 600 million, but there has been speculation that it could fetch over USD 1 billion thanks to its location in a large and potentially lucrative US market and upcoming negotiations regarding money-spinning television rights.
Multiple US media outlets had reported that Shelly Sterling was accepting bids for the club, even as Donald Sterling vowed to fight the league's effort to force him out.
Yesterday, the NBA said league officials were reviewing the responses from both Sterlings and remained on course for next Tuesday's hearing, which could seal their fate.