Daniil Medvedev celebrates after beating Alejandro Fokina of Spain during a quarter final match of the Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates.

Daniil Medvedev serves to Alejandro Fokina of Spain during a quarter final match of the Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates.

Alejandro Fokina of Spain returns the ball to Daniil Medvedev during a quarter final match of the Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates.

Daniil Medvedev returns the ball to Alejandro Fokina of Spain during a quarter final match of the Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates.

Alejandro Fokina of Spain returns the ball to Daniil Medvedev during a quarter final match of the Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates.

Sebastian Korda of the U.S. reacts after losing a ball to Andrey Rublev during a quarter final match of the Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates.

Andrey Rublev returns the ball to Sebastian Korda of the U.S. during a quarter final match of the Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates.

Andrey Rublev returns the ball to Sebastian Korda of the U.S. during a quarter final match of the Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates.

Andrey Rublev reacts against Sebastian Korda of the U.S. during a quarter final match of the Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates.