Lamar Odom had been training for a basketball comeback before his collapse.

The 35-year-old former Los Angeles Lakers player was found unconscious in a Nevada brothel, allegedly with ''virtually every drug imaginable'' in his body after partying with prostitutes for four days but friends of Lamar insist he was trying to make a professional comeback.

A source close to the star revealed he had been training at Life Time Athletic gym in Henderson, Nevada, in order to get himself in shape.

The insider told E! News: ''He seemed pretty serious about training to get a pro tryout. He had trainers with him and was working on his shot. He also was working on his cardio on the Stairmaster. He looked good.''

Lamar's trainer Fareed Samad told TMZ: ''He moved [to Nevada] because of [pro boxer] Zab Judah, and Zab Judah told him to come here and train with me if he wanted to like, you know, like make his way back to the NBA. Physically, he was doing OK. He was down 35 pounds. He would take, you know, like hiatuses once in a while. It's more mental than physical with him.''

A 911 call made from the brothel confirmed Lamar took cocaine last Saturday (10.10.15) and owner Dennis Hof revealed he was taking herbal Viagra and drinking cognac.

The combination of herbal Viagra and cocaine can be deadly.

A source told E! News: ''Drugs were found in his system. [He] had been partying since Friday. He was doing crack cocaine all weekend. They're now having to fix all the damage it has done.

''Virtually every drug imaginable was found in his system.''

Meanwhile, Lamar reportedly opened his eyes on Friday (16.10.15) and briefly communicated with estranged wife Khloé Kardashian.

A source told E! News that the basketball star gave the 'Keeping Up with the Kardashians' beauty a thumbs up and said, ''Hey, baby,'' before going back to sleep.

The insider also claimed he has been taken off a ventilator and is breathing by himself.