July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Enttaeuschung bei Henri Laaksonen (SUI) (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Henri Laaksonen (SUI) (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Henri Laaksonen (SUI) (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Henri Laaksonen (SUI) (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Enttaeuschung bei Henri Laaksonen (SUI) (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Henri Laaksonen (SUI) (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Henri Laaksonen (SUI) (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Thomaz Bellucci (BRA) mit Schiedsrichter (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Fearure Tennisschuhe und Sand (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Thomaz Bellucci (BRA) (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Henri Laaksonen (SUI) (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Thomaz Bellucci (BRA) (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Henri Laaksonen (SUI) (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Henri Laaksonen (SUI) (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Henri Laaksonen (SUI) (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Henri Laaksonen (SUI) (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

July 26, 2017 - Gstaad, Schweiz - 26.07.2016, Gstaad, Tennis, Swiss Open Gstaad 2017, Henri Laaksonen (SUI) (Credit Image: Š Pascal Muller/EQ Images via ZUMA Press)

GSTAAD, SWITZERLAND JULY 26: Roman Jebavy (CZE) during the ATP J.Safra Sarasin Swiss Open Gstaad. (CTK/RvS.Media/Monika Majer)

GSTAAD, SWITZERLAND JULY 26: Roman Jebavy (CZE) during the ATP J.Safra Sarasin Swiss Open Gstaad. (CTK/RvS.Media/Monika Majer)

GSTAAD, SWITZERLAND JULY 26: Roman Jebavy (CZE) during the ATP J.Safra Sarasin Swiss Open Gstaad. (CTK/RvS.Media/Monika Majer)

GSTAAD, SWITZERLAND JULY 26: Roman Jebavy (CZE) and Matwe Middelkoop (NED) during the ATP J.Safra Sarasin Swiss Open Gstaad. (CTK/RvS.Media/Monika Majer)

GSTAAD, SWITZERLAND JULY 26: Roman Jebavy (CZE) during the ATP J.Safra Sarasin Swiss Open Gstaad. (CTK/RvS.Media/Monika Majer)

GSTAAD, SWITZERLAND JULY 26: Roman Jebavy (CZE) during the ATP J.Safra Sarasin Swiss Open Gstaad. (CTK/RvS.Media/Monika Majer)

GSTAAD, SWITZERLAND JULY 26: Roman Jebavy (CZE) during the ATP J.Safra Sarasin Swiss Open Gstaad. (CTK/RvS.Media/Monika Majer)

GSTAAD, SWITZERLAND JULY 26: Roman Jebavy (CZE) during the ATP J.Safra Sarasin Swiss Open Gstaad. (CTK/RvS.Media/Monika Majer)

GSTAAD, SWITZERLAND JULY 26: Roman Jebavy (CZE) during the ATP J.Safra Sarasin Swiss Open Gstaad. (CTK/RvS.Media/Monika Majer)

GSTAAD, SWITZERLAND JULY 26: Roman Jebavy (CZE) and Matwe Middelkoop (NED) during the ATP J.Safra Sarasin Swiss Open Gstaad. (CTK/RvS.Media/Monika Majer)

Thomaz Bellucci of Brazil returns the ball to Henri Laaksonen of Switzerland during their first round match at the Swiss Open tennis tournament in Gstaad, Switzerland, Wednesday, July 26, 2017. (Peter Schneider/Keystone via AP)

Thomaz Bellucci of Brazil returns the ball to Henri Laaksonen of Switzerland during their first round match at the Swiss Open tennis tournament in Gstaad, Switzerland, Wednesday, July 26, 2017. (Peter Schneider/Keystone via AP)

Andrey Kuznetsov of Russia plays against F. Mayer of Germany in the men's single at the Tennis ATP-Tour German Open in Hamburg, Germany, 26 July 2017. Photo: Daniel Bockwoldt/dpa

Florian Mayer of Germany in action against A. Kuznetsov of Russia in the men's single at the Tennis ATP-Tour German Open in Hamburg, Germany, 26 July 2017. Photo: Daniel Bockwoldt/dpa

Florian Mayer of Germany in action against A. Kuznetsov of Russia in the men's single at the Tennis ATP-Tour German Open in Hamburg, Germany, 26 July 2017. Photo: Daniel Bockwoldt/dpa

Florian Mayer of Germany in action against A. Kuznetsov of Russia in the men's single at the Tennis ATP-Tour German Open in Hamburg, Germany, 26 July 2017. Photo: Daniel Bockwoldt/dpa

Andrey Kuznetsov of Russia in action against F. Mayer of Germany in the men's single at the Tennis ATP-Tour German Open in Hamburg, Germany, 26 July 2017. Photo: Daniel Bockwoldt/dpa

Florian Mayer of Germany plays against A. Kuznetsov of Russia and celebrates in the men's single at the Tennis ATP-Tour German Open in Hamburg, Germany, 26 July 2017. Photo: Daniel Bockwoldt/dpa

Andrey Kuznetsov of Russia in action against F. Mayer of Germany in the men's single at the Tennis ATP-Tour German Open in Hamburg, Germany, 26 July 2017. Photo: Daniel Bockwoldt/dpa

Thomaz Bellucci of Brazil returns the ball to Henri Laaksonen of Switzerland during their first round match at the Swiss Open tennis tournament in Gstaad, Switzerland, Wednesday, July 26, 2017. (Peter Schneider/Keystone via AP)

Henri Laaksonen of Switzerland returns the ball to Thomaz Bellucci of Brazil during their first round match at the Swiss Open tennis tournament in Gstaad, Switzerland, Wednesday, July 26, 2017. (Peter Schneider/Keystone via AP)

Thomaz Bellucci of Brazil returns the ball to Henri Laaksonen of Switzerland during their first round match at the Swiss Open tennis tournament in Gstaad, Switzerland, Wednesday, July 26, 2017. (Peter Schneider/Keystone via AP)

Henri Laaksonen of Switzerland returns the ball to Thomaz Bellucci of Brazil during their first round match at the Swiss Open tennis tournament in Gstaad, Switzerland, Wednesday, July 26, 2017. (Peter Schneider/Keystone via AP)

Thomaz Bellucci of Brazil returns the ball to Henri Laaksonen of Switzerland during their first round match at the Swiss Open tennis tournament in Gstaad, Switzerland, Wednesday, July 26, 2017. (Peter Schneider/Keystone via AP)

Thomaz Bellucci of Brazil returns the ball to Henri Laaksonen of Switzerland during their first round match at the Swiss Open tennis tournament in Gstaad, Switzerland, Wednesday, July 26, 2017. (Peter Schneider/Keystone via AP)

Thomaz Bellucci of Brazil returns the ball to Henri Laaksonen of Switzerland during their first round match at the Swiss Open tennis tournament in Gstaad, Switzerland, Wednesday, July 26, 2017. (Peter Schneider/Keystone via AP)

26.07.2017., Belgrade, Serbia - The best Serbian tennis player Novak Djokovic confirmed today at a press conference that he finished the season due to elbow injury and added that he made a radical move, but he has to solve the problem that lasts about a year and a half. Djokovic was taking photos with fans and shared autographs. Photo: Srdjan Ilic/PIXSELL

26.07.2017., Belgrade, Serbia - The best Serbian tennis player Novak Djokovic confirmed today at a press conference that he finished the season due to elbow injury and added that he made a radical move, but he has to solve the problem that lasts about a year and a half. Djokovic was taking photos with fans and shared autographs. Photo: Srdjan Ilic/PIXSELL

26.07.2017., Belgrade, Serbia - The best Serbian tennis player Novak Djokovic confirmed today at a press conference that he finished the season due to elbow injury and added that he made a radical move, but he has to solve the problem that lasts about a year and a half. Photo: Srdjan Ilic/PIXSELL

26.07.2017., Belgrade, Serbia - The best Serbian tennis player Novak Djokovic confirmed today at a press conference that he finished the season due to elbow injury and added that he made a radical move, but he has to solve the problem that lasts about a year and a half. Photo: Srdjan Ilic/PIXSELL

26.07.2017., Belgrade, Serbia - The best Serbian tennis player Novak Djokovic confirmed today at a press conference that he finished the season due to elbow injury and added that he made a radical move, but he has to solve the problem that lasts about a year and a half. Photo: Srdjan Ilic/PIXSELL

26.07.2017., Belgrade, Serbia - The best Serbian tennis player Novak Djokovic confirmed today at a press conference that he finished the season due to elbow injury and added that he made a radical move, but he has to solve the problem that lasts about a year and a half. Photo: Srdjan Ilic/PIXSELL

26.07.2017., Belgrade, Serbia - The best Serbian tennis player Novak Djokovic confirmed today at a press conference that he finished the season due to elbow injury and added that he made a radical move, but he has to solve the problem that lasts about a year and a half. Photo: Srdjan Ilic/PIXSELL