Essendon midfielder Jake Melksham suffered a broken hand on Friday, completing a horrific week for the besieged AFL club.

A teammate accidentally kicked Melksham during their intra-club match.

But coach James Hird was confident the injury would not interrupt the 21-year-old's pre-season.

"Jake will have the operation today but he will be back into training on Monday," Hird told the club website.

"We look forward to him playing in the next two to three weeks."

The Bombers are under an anti-doping investigation after they went to the league earlier this week with concerns about supplements their players took last season.