Dubai Duty Free Tennis Championships
Polish qualifier Hubert Hurkacz stunned top seed Kei Nishikori 7-5, 5-7 and 6-2 to reach the quarter-finals of the Dubai Duty Free Tennis Championships.
Hurkacz converted six out of seven break points to beat his Japanese opponent in a little over two hours.
World number 113 Ricardas Berankis continued his fine form with a 6-4 and 6-1 victory over American Denis Kudla.
And Roger Federer beat the Spanish veteran 6-3 3-6 6-3 to reach the next round
The 20-times grand slam champion next faces Hungary's Marton Fucsovics who beat Jan-Lennard Struff 6-4 6-2.