Hubert Hurkacz and John Isner have won this year’s Miami Masters doubles title after defeating Wesley Koolhof and Neal Skupski in the final. Hurkacz and Isner, who were unseeded, overcame No. 6 seeds Koolhof and Skupski in straight sets to win their first team title. Koolhof and Skupski had the first break point of the match but Hurkacz and Isner saved a break point in the second game to avoid going down by an early break. Hurkacz and Isner had the first break points in the ninth game but failed to convert as Koolhof and Skupski saved two break points to open a 5-4 lead. As no breaks were seen in the first set, the opener had to be resolved in a tie-break. Koolhof and Skupski had a 5-4 lead through the opening nine po …