Zykov was suspended for 20 games on Oct. 17 for violating the NHL/NHLPA performance-enhancing substances program. The ban is set to end after Vegas' contest Wednesday. The 24-year-old would've been eligible to play Friday.
Following the announcement of Zykov's suspension, the Golden Knights said the 24-year-old forward "knowingly used a banned substance without the consent, recommendation, or knowledge" of the team.
Zykov collected two assists in seven games before the ban.
The Russian winger was selected by the Los Angeles Kings in the second round of the 2013 NHL Draft. In 47 pro contests, he's tallied six goals and 15 points.