'Unspeakably sad': Young tennis star's tragic news days before US Open

Amanda Anisimova has been rocked by the death of her father. Pic: Getty

Rising American teenager Amanda Anisimova has withdrawn from the US Open following the death of her father.

ESPN reported that the teenager's father and longtime coach Konstantin Anisimov, passed away on the eve of the year's final grand slam.

The cause of death was unknown.

The personal tragedy is a devastating blow for the 17-year-old. Pic: Getty

Konstantin and wife Olga moved to the States from Russia in 1998 and under his guidance the 17-year-old rose up the WTA ranks.

Devastated fans have posted heartfelt condolences to Anisimova on social media.

The world No.24 and 2017 US Open junior champion looked to be a danger in Flushing Meadows after she upset defending French Open champion Simona Halep to reach the semi-finals of that tournament earlier this year.

With agencies