Three matches to watch on Tuesday at the US Open

AFP Sport looks at three matches to watch on Day 2 of 2024's final Grand Slam, which will conclude on September 8 (x denotes seeded player): Jannik Sinner (ITA x1) v Mackenzie McDonald (USA) -- Australian Open champion Sinner plays his first match since it emerged he had twice tested positive for a banned substance but had escaped a lengthy ban. The 23-year-old was cleared of any wrongdoing over the presence of anabolic agent clostebol after it was ruled he had been inadvertently contaminated by his physio...