COVID-19 protocols cause Gregor Gillespie vs. Brad Riddell scratch from UFC on ESPN 21

UFC on ESPN 21 has lost its co-main event between Gregor Gillespie and Brad Riddell.

UFC officials announced Saturday that the lightweight matchup between Gillespie (13-1 MMA, 6-1 UFC) and Riddell (9-1 MMA, 3-0 UFC) is off due to COVID-19 protocols. No specific details were revealed.

According to the UFC, the matchup is expected to be postponed to a later date to be determined.

With the subtraction of the fight, the new UFC on ESPN 21 lineup now includes:

MAIN CARD (ESPN, ESPN+, 10 p.m. ET)

• Derek Brunson vs. Kevin Holland
• Cheyanne Buys vs. Montserrat Ruiz
• Gustavo Lopez vs. Adrian Yanez
• Max Griffin vs. Song Kenan
• Harry Hunsucker vs. Tai Tuivasa

PRELIMINARY CARD (ESPN2, ESPN+, 7:30 p.m. ET)

• Macy Chiasson vs. Marion Reneau
• Grant Dawson vs. Leonardo Santos
• Roman Dolidze vs. Trevin Giles
• Montel Jackson vs. Jesse Strader
• JP Buys vs. Bruno Silva