"Tennis drug testing is the most strenuous" –"Brutal" doping tests during off-season recalled by ex-ATP pros Steve Johnson, John Isner, Sam Querrey
Former tennis players Steve Johnson, John Isner, and Sam Querrey recently recalled their off-season doping test experiences.
https://www.sportskeeda.com/tennis/news-tennis-drug-testing-strenuous-brutal-doping-tests-off-season-recalled-ex-atp-pros-steve-johnson-john-isner-sam-querrey
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