John Isner stuns Alexander Zverev to lift Miami Open

John Isner poses with Alexander Zverev before the final at the Miami Open. | AP

Alexander Zvere serves to John Isner during the final at the Miami Open. | AP

Alexander Zverev returns to John Isner during the final at the Miami Open. | AP

Alexander Zverev, of Russia, returns to John Isner during the final at the Miami Open. | AP

John Isner hits a return to Alexander Zverev during the final at the Miami Open. | AP

Alexander Zverev reacts after winning a point against John Isner during the final at the Miami Open. | AP

John Isner reacts after winning point against Alexander Zverev during the final at the Miami Open. | AP

Alexander Zverev returns to John Isner during the final at the Miami Open. | AP

John Isner serves to Alexander Zverev during the final at the Miami Open. | AP

Alexander Zverev reacts after losing a point against John Isner during the final at the Miami Open. | AP

Alexander Zverev reacts after losing a point against John Isner during the final at the Miami Open. | AP

John Isner, left, and Alexander Zverev embrace at the net after the final at the Miami Open. | AP

John Isner reacts after defeating Alexander Zverev in the final at the Miami Open. | AP

Alexander Zverev, left, and John Isner poses with their trophies after the final at the Miami Open. | AP

John Isner holds the trophy after defeating Alexander Zverev in the men's final at the Miami Open. | AP