Swimmer Adam Peaty tested positive for COVID a day after winning silver in the 100m breaststroke, the British Olympic Association announced on Monday. Peaty had complained about a sore throat after the finals, where he fell just .02 seconds short of gold.

The British swimmer said he woke up to a “curveball” and felt discomfort “a little bit on my throat” but added that he refused to use that as an excuse. The two-time champion was hoping for his third consecutive gold on Sunday night but was narrowly defeated by Nicolo Martinenghi of Italy. He shares his silver medal with Nic Fink of the U.S.