Nick Kyrgios hopes that his impressive form at the Mexican Open shows he is back on track after he struggled in the first few weeks of the year.
The Australian followed up his victory against Rafael Nadal by defeating Stanislas Wawrinka 7-5 6-7 6-4 in the quarter-finals of the tournament.
"I'm extremely tired," admitted Kyrgios after the match. "I showed great resilience to come out and beat a player like Stan in some tough conditions.
"I knew I was going to be the underdog and the crowd was going to be in [his] favour, but I served great...the way I've competed the last two days is massive. I've left it all out there."
Kyrgios, whose poor recent form means he has slumped down to 72nd in the world rankings, will play John Isner in the semi-finals.
He added: "I didn't pull up so great after the match against Rafa… but I just love playing here. Even though the crowd can get rowdy at times, the atmosphere is amazing.
"Before this tournament, I wasn't playing very good. I was struggling with injuries. To have two good wins, I feel like the year is going back on track for me."
Isner got the better of the eight seeded John Millman 7-6 6-7 7-6. Kyrgios is 8/11 to beat Isner and 3/1 to win the Mexican Open outright.
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