Poland's Hubert Hurkacz showed his Wimbledon credentials on Sunday, hammering world number one Daniil Medvedev 6-1 6-4 to win the ATP 500 grasscourt tournament in Halle, Germany. World number 12 Hurkacz defeated Medvedev and Roger Federer en route to the semi-finals at Wimbledon last year and showed he will once again be a force to reckon with when the Championships …