Suarez Navarro suffers shock defeat in Japan

Thiem edges Djokovic while Federer beats Berrettini at ATP Finals

Top-seeded Carla Suarez Navarro stunned the crowd when she was defeated by world number 85 Kateryna Bondarenko 6-4, 6-4 during the opening day of the Japan Open in Tokyo.

However, that wasn't the first time the Ukrainian managed to topple Navarro. In 2011, Bondarenko managed to beat the Spaniard at Bad Gastein in Austria, their only previous meeting against each other.

Despite plenty of straight sets victories, it was also a day of comebacks as Zheng Saisai of China, Johanna Larsson of Sweden and American Irina Falconi all overcame their opponents from a set down to advance to the next round.

New tournament favourite, Zarina Diyas, who was seeded second coming into the tournament, cruised comfortably passed promising Dutch player Kiki Bertens 6-4, 6-4.

With Bondarenko's victory, she will now go on to face Slovakian Jarmila Gajdosova, who beat 26-year-old Alexandra Panova in straight sets.

Now that Navarro is out of the way, Diyas will hoping to capitalise on the situation as she enters the next round with a match against WTA title winner Magda Linette, who beat Lauren Davis of America in the first round.