PARIS—Rafael Nadal was locked in a tight, compelling, and lengthy French Open semifinal Friday when his opponent, third-seeded Alexander Zverev, ran to to chase a shot and twisted his right ankle. Zverev crumpled to the ground, wailing in agony and clutching at his lower leg.
His black outfit, arms and legs caked with rust-colored clay, Zverev was helped up by a trainer, then taken away from the court in a wheelchair. Minutes later, after Nadal saw him crying in a small room in the stadium, Zverev came back out onto Court Philippe Chatrier on crutches, his right shoe removed, and conceded the match, unable to continue….