Kanstantsin Sivtsov (or Siutsou is a Belarusian former professional road bicycle racer, who rode professionally between 2001 and 2018 for the Itera, Lokomotiv, Fassa Bortolo, Acqua & Sapone, Barloworld, HTC–Highroad, Team Sky, Team Dimension Data and Bahrain–Merida squads. He retired after provisionally being suspended from the sport following an adverse analytical finding for erythropoietin.

Fassa Bortolo (2000–2005) was a professional road bicycle racing team founded in 2000 and led by Giancarlo Ferretti. Dubbed the 'Silver Team', it managed to be one of the most successful teams of the era, not in the least due to top sprinter Alessandro Petacchi. In its six competitive years, Fassa Bortolo won over 200 races, including stages in all three Grand Tours. It was one of the inaugural 20 UCI ProTour teams in 2005.