Muchova marches into US Open semis with win over Cirstea
Karolina Muchova was happy with all facets of her game as she overwhelmed Romania’s Sorana Cirstea
Serena begins marathon with exhausting first step
Serena Williams shook off some COVID-19 layoff rust to grind out a 7-6(6) 3-6 7-6(0) win over Dutch