John Isner completes Sunshine Double, wins Miami doubles title with Hubert Hurkacz

"It certainly feels good, but I partnered up well," Isner said in victory. "It's a pleasure playing with Hubi. He does so many things so well, as we know, and he's got so much doubles skill also. It's so much fun for me. This was a pretty special day for Hubi and me. Without [him], we wouldn't have won this title, that's for sure."

Read more: John Isner, Jack Sock win second Indian Wells doubles title

As wild cards, Isner and Hurkacz upset three Grand Slam-winning teams en route to reaching the final, including No. 2 seeds Rajeev Ram and Joe Salisbury in the quarterfinals. Playing a tournament together for the first time, they lost just one set in their five victories. 

"I think John is the hottest doubles player on tour right now," Hurkacz said. "It definitely was a fun week. Playing with John is such a pleasure so we had a great time."

Other Americans who shined at the combined ATP and WTA 1000 event included:

• Jessica Pegula reached her second career WTA 1000-level semifinal before losing to eventual champion Iga Swiatek (6-2, 7-5).
• Danielle Collins advanced to the quarterfinals before losing to eventual runner-up Naomi Osaka. 
• A trio of American men reached the fourth round: Jenson Brooksby, Taylor Fritz and Frances Tiafoe.
• 21-year-old Ann Li (King of Prussia, Pa.) earned the first Top 10 win of her career in Round 2 vs. world No. 7 Anett Kontaveit (6-0, 3-6, 6-4).
• Coco Gauff and Caty McNally reached the doubles semifinals.