Fans on the grounds during the first day of the US Open Tennis Championship at the USTA National Tennis Center in Flushing Meadows, New York, USA, 29 August 2016. The US Open runs through September 11. EPA/JUSTIN LANE
Caroline Wozniacki of Denmark hits a return to Taylor Townsend of the US during their match on the first day of the US Open Tennis Championship at the USTA National Tennis Center in Flushing Meadows, New York, USA, 29 August 2016. The US Open runs through September 11. EPA/JOHN G. MABANGLO
Marin Cilic of Croatia hits a return to Rogerio Dutra Silva of Brazil during their match on the first day of the US Open Tennis Championship at the USTA National Tennis Center in Flushing Meadows, New York, USA, 29 August 2016. The US Open runs through September 11. EPA/JASON SZENES
Roberta Vinci of Italy hits a return to Anna-Lena Friedsam of Germany during their match on the first day of the US Open Tennis Championship at the USTA National Tennis Center in Flushing Meadows, New York, USA, 29 August 2016. The US Open runs through September 11. EPA/ANDREW GOMBERT
Andrea Petkovic of Germany hits a return to Kristina Kucova of Slovakia during their match on the first day of the US Open Tennis Championship at the USTA National Tennis Center in Flushing Meadows, New York, USA, 29 August 2016. The US Open runs through September 11. EPA/JUSTIN LANE
Topics: 10sballs, 2016 U.S. Open, Andrea Petkovic, Atp World Tour, Caro Wozniacki, Flushing Meadows, Kristina Kucova, Marin Cilic, New York, Roberta Vinci, Sports, Tennis, US Open tennis, Wta