Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Polona Hercog from Slovania in action against Elise Mertens from Belgium in action during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Polona Hercog from Slovania in action against Elise Mertens from Belgium in action during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Elise Mertens from Belgium in action against Polona Hercog from Slovania during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Elise Mertens from Belgium in action against Polona Hercog from Slovania during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Polona Hercog from Slovania in action against Elise Mertens from Belgium in action during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Polona Hercog from Slovania in action against Elise Mertens from Belgium in action during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Polona Hercog from Slovania in action against Elise Mertens from Belgium in action during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Polona Hercog from Slovania in action against Elise Mertens from Belgium in action during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Polona Hercog from Slovania in action against Elise Mertens from Belgium in action during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Elise Mertens from Belgium celebrates a winning shot during her First Round, Ladies Singles Match against Polona Hercog from Slovania on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Elise Mertens from Belgium in action against Polona Hercog from Slovania during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Elise Mertens from Belgium in action against Polona Hercog from Slovania during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Polona Hercog from Slovania celebrates a winning shot against Elise Mertens from Belgium during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Polona Hercog from Slovania in action against Elise Mertens from Belgium during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Polona Hercog from Slovania in action against Elise Mertens from Belgium during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Polona Hercog from Slovania stretches to return a shot to Elise Mertens from Belgium during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Polona Hercog from Slovania in action against Elise Mertens from Belgium during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Polona Hercog from Slovania in action against Elise Mertens from Belgium during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Polona Hercog from Slovania returns a forehand shot to Elise Mertens from Belgium during their First Round, Ladies Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Guillermo Garcia-Lopez from Spain hits a forehand during his First Round, Men's Singles Match against Jeremy Chardy France on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Jeremy Chardy of France in action against Guillermo Garcia-Lopez from Spain in their First Round, Men's Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Jeremy Chardy of France in action against Guillermo Garcia-Lopez from Spain in their First Round, Men's Singles Match on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Natalia Vikhlyantseva of Russia competes in her first round match against Kiki Bertens of the Netherlands on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)

Libema Open 2018

ROSMALEN, NETHERLANDS - JUNE 12: Natalia Vikhlyantseva of Russia in action during her first round match against Kiki Bertens of the Netherlands on Day Two of the Libema Open 2018 on June 12, 2018 in Rosmalen, Netherlands. (Photo by Andy Astfalck/Getty Images)