Wawrinka will play four-time Indian Wells champion Roger Federer or American Jack Sock in Sunday's final.
Sock's semifinal opponent will be Roger Federer, who advanced with a walkover after Nick Kyrgios withdrew with an illness. "I think there were too many unforced errors and I wasn't playing aggressive enough to get more chances".
But the voice enhancement tool wasn't the only thing that made the follow-up better, as 12-time Grand Slam victor Novak Djokovic appeared in a short cameo and belts out a tune. "I don't take these decisions lightly, these are the matches we train for, but I'm in no fit state to take the court".
"I'm sorry to the fans... but I have to put my health first and I hope you understand".
Federer has yet to lose serve during the tournament, saving the only break point he has faced.
Jack Sock celebrated a pair of firsts on Friday by powering past fourth seed Kei Nishikori 6-3, 2-6, 6-2 to book a date with Roger Federer in the semi-finals of the BNP Paribas Open in Indian Wells, California.
NY paramedic struck and killed by stolen ambulance
Then Jose Gonzalez jumped into the driver's seat and took off in the ambulance, said FDNY Commissioner Daniel Nigro said. Of course, you know, I love her", said Arroyo's son Edgar, 22. "Tonight's tragedy in the Bronx is terrible ", he said.
"I will definitely be back".
But Federer flashed some brilliance in a fourth-round thumping of his old foe Rafael Nadal, beating the Spaniard 6-2, 6-3 in a reprise of his epic five-set win in the Australian Open final in January.
Having had an easy passage to the last-four match, Sock, who will be raring to go and make it to the next level with a big win, will have to be at his best if he has to produce the goods against Federer.
But playing tennis was the furthest thing from their minds during this hilarious rendition of the Chicago tune.
Scrambling to find something for fans to watch, tournament officials trotted out tournament director-player Tommy Haas and Vasek Pospisil for a one-set exhibition.