Kristin Armstrong has won the gold medal in the women's time trial - and though she wasn't British, most people were just glad she wasn't Russian.
-- BBC Sport (@BBCSport) August 10, 2016
Olga Zabelinskaya, the Russian contestant who took the silver medal, was very controversial - she has only just returned to the sport after an 18 month ban for doping.
Twitter users were cheering on American athlete Kristin, the last to go round the track, when it became clear that she was the only person who could knock the Russian off the top spot.
-- Matt (@Mattys123) August 10, 2016
-- PolderSpeed (@PolderSpeed) August 10, 2016
It'll be very upsetting if Kristin Armstrong loses this to a DSR (Dirty Sneaky Russian) #Rio2016
-- brad culp (@bbculp) August 10, 2016
When Kristin did win, the internet was a mix of ecstatic and relieved.
-- USA Cycling (@usacycling) August 10, 2016
43 tomorrow, #happybirthday ????????
-- Clive Mitchell (@clivemitchell57) August 10, 2016
-- Catherine Robertson (@catrobb) August 10, 2016
Seeing Olga on the podium promoted a debate as to whether ex-dopers should even be allowed to return and compete again.
How can a Russian cyclist with doping past still complete at the Olympics???? #rio2016
-- Lars Sammelius (@sammelius) August 10, 2016
Sick of seeing these Russian's who have previously doped get onto the podium. If you cheat you should not be allowed back. #Rio2016
-- Matthew (@MatthewGrist1) August 10, 2016
Kristin, a mother of one, turns 43 tomorrow, and is still the best in the world at her sport - an inspiration to us all.
Brit Emma Pooley finished in 14th place.