The Swiss Tennis player and 20-time Grand slam champion, Roger Federer, has withdrawn from this month’s Toronto and Cincinnati Masters events with a knee injury, putting his US Open participation in doubt.
Due to a “setback to his knee” after being knocked out of the Wimbledon quarter-finals, the 39-year-old missed the Tokyo Olympics.
Previous year, Federer underwent double knee surgery.
Federer, ranked ninth in the world, and has 103 career titles from his 23 years on tour, with a combined 310 weeks at number one.
Tokyo men’s singles gold medallist Alexander Zverev will also skip the tournament in Toronto to get some extra rest.
Meanwhile, Harris will face Japan’s Kei Nishikori in the quarter-final after Nishikori beat Britain’s Cameron Norrie.