According to sources, friends of the world's wealthiest man tried to convince him not to buy Twitter once they realized he was serious about the acquisition.
The billionaire friend of Musk, who was an early employee of Musk and later co-founded LinkedIn, told the magazine that he was upset by the deal.
The people close to Musk were worried about how the acquisition would affect Musk's focus at both companies.
Greylock Partners did not take part in the financing of the company, but they were optimistic about Musk's ability to lead the company.
After buying a 9.2% stake in the company, Musk made an offer to buy the rest of the company. One of the platform's most popular and polarizing users is Musk. Musk tried to pull out of the purchase agreement in July, but was sued days later by the social media company to push the deal through. The five-day trial will be held in Delaware.
It is estimated that Musk is worth more than the next largest person. He has served on Microsoft's board since the company acquired LinkedIn.
Axios has a debate between Musk and the social networking site.
Musk is trying to get out of the deal.