Novak Djokovic was handed a defeat of 7-6 (11/9), 7-5 in the quarter-finals by sixth seeded Nick Kyrgios.
Acapulco: The ATP Tour's Mexico Open saw a dramatic development as World No. 2 Novak Djokovic crashed out of the tournament, while Rafael Nadal continued his winning streak and entered the semifinals.
Djokovic was handed a defeat of 7-6 (11/9), 7-5 in the quarter-finals by sixth seeded Nick Kyrgios.
21-year-old Kyrgios blasted 25 aces and won 81 percent of his first-serve points in the one hour, 47 minute match.
Kyrgios will now meet American Sam Querrey for a place in the final.
Nadal, on the other hand, defeated Japan's Yoshihito Nishioka 7-6 (2), 6-3 to reach the semifinals.
The 30-year-old Spaniard overcame a 4-2 deficit in the first set and got out of a 0-2 hole in the second.
Nadal will now face Croatiam third-seed Marin Cilic.