The two cases were held separately by the UCI Anti-Doping Tribunal.

Ramos was handed a four-year ban after the presence of continuous erythropoietin receptor activator (CERA) in a sample.

The sample was taken in an out-of-competition doping control on July 31 in 2016, just six days before the men's Olympic road race took place in Rio de Janeiro. 

CERA is classified as peptide hormones, growth factors, related substances and mimetics.

The Brazilian cyclist's ban began on the date of his failed test and will run until August 9 in 2020, the date of the Tokyo 2020 Olympic Closing Ceremony.

Ramos had ridden for the Funvic Soul Cycles-Carrefour team, who served a 55-day suspension in 2016 after three of their riders - including the Brazilian - tested positive within a 12-month period.

Under their 2017 guise as the Soul Brasil Pro Cycling team, they were again banned for 35 days from between July 15 and August 19 following doping cases being announced against two of its riders last March.

German cyclist Matzka has been given a two-year ban following a positive test, which contained the presence of a metabolite of tamoxifen.

Tamoxifen is classified under selective estrogen receptor modulators and can be used to treat breast cancer, but increases the production of testosterone.

While the positive test occurred on March 31, the Bora-Hansgrohe team opted not to go public until July 2017, with their team manager Ralph Denk stating it was believed the failure had been likely due to contamination of water.

The decision to not go public initially was claimed to have been to protect the athlete, with Matzka insisting he was innocent.

Matzka did not race for a team during the 2017 season.

The German’s period of disqualification started on March 3 in 2016, with the sanction due to end on November 27 this year.