Baroness Tanni Grey-Thompson has called for a "fair and transparent" system of Paralympic classification.
Paralympic champion Sophie Hahn denied abusing the classification system following a campaign led by Michael Breen, who claimed Hahn did not have the required disability to compete alongside his daughter; long jump world champion Olivia Breen.
Grey-Thompson, who won 11 Paralympic titles during a legendary career, was asked by Giles Watling MP if the current system of classifying the disabilities of athletes was fit for purpose.
Grey-Thompson told a Digital, Culture, Media and Sport committee: 'We need to ask the question whether classification is fair and transparent and whether athletes can make an appeal or complaint in an open and fair process.
"Judged on what I have been told, I don't believe we can answer that question right now."
The International Paralympic Committee reacted firmly, telling Press Association: "We strongly refute any accusations that the classification system in Paralympic sport is broken and not fit for purpose.
"Just because a small group of athletes and coaches are allegedly seeking to break the rules does not mean that the allegations equate to a broken system. To date, there have been no substantiated allegations regarding intentional misrepresentation in para-sport."