Derrick Lewis knocked out Dokos in the first round of the UFC Fight Night 199 main event

American fighter Derrick Lewis defeated compatriot Chris Dokos in the main fight of UFC Fight Night 199.

The heavyweight bout ended with Lewis winning by knockout in the first round.

The 36-year-old Lewis has 26 wins and 8 losses, while Dokos has 12 wins and 4 losses.