Jakub Mensik used his length to shrink the court, erasing Novak Djokovic's ability to find winners in a shock upset for his first career tennis title Sunday at the Miami Open.

Mensik's strength won the tie-break once more, and when Djokovic went long on a return to give him the victory, he collapsed on his back in joy.

Watching Djokovic has become a live-action demonstration of a tennis player figuring out his limits from match to match and week to week.