This incident occurred at approximately 7 pm local time last night in the Village, with the 32-year-old reportedly feeling "suddenly and unexpectedly" faint.
Despite the urgent matter, the world number three in the men's singles has regained consciousness and is responsive.
"The emergency services arrived quickly on the spot and took Joachim Gérard to the hospital," said a statement from the Belgian Paralympic Committee.
"He had regained consciousness and was able to answer questions."
"First research is pointing towards a cardiac issue."
"Gérard will have to stay at the hospital for further observations and research."
"The Belgian Paralympic Committee hopes to be able to give more information about Joachim's status soon."
"We ask everybody to respect the privacy of the athlete and his family."
Follow us !