The US Open is Caroline Wozniacki's most successful Grand Slam, with her 2009 and 2014 runner-up finishes, but in Thursday's second-round match her 149th-ranked opponent Petra Cetkovska embraced the "just do it" attitude, saved four match points and showed the Dane the exit door.
The fourth-seeded Wozniacki was the first to go up in the match, 4-2, before Cetkovska captured the next seven games and climbed up to a 4-1 lead in the second set. Then Wozniacki won six of the next seven games and the match progressed into the deciding set.
Cetkovska said to herself "now or never" and "just went for it", as she later revealed in the post-match interview, and that mindset helped her save one match point to hold for 5-5 in the intense third set and three more match points at 5-6 to force a tiebreak.