Pipe's clinicality on the doubles would continue though, pouncing on double eight after Smith had missed six darts at double.
His actions were criticised by former player and now pundit Wayne Mardle, who called for an official investigation.
With the game locked at two sets apiece and Smith leading two legs to one up in the fifth, he was left with a 56 finish to secure the win.
As he stood to take the shot, however, Pipe could be seen coughing in the background, with many onlookers wondering if he had done so on goal to distract Smith.
Sure, it seems like a pretty stupid and childish thing to do, especially when it's live on TV and in front of thousands at Alexandra Palace, but can a person coughing really put off a darts player when the noise of thousands of beery fans dressed as nuns doesn't?
Smith took the lead for the first time in the match as he checked out 83 to put Pipe on the back foot. "I've got a cough, I've got a cough, I turn away". A tactic to make Bernie miss. The haters will hate, but I will post the pictures of Bernie's message to me, saying: 'I didn't hear anything bro'.
"If Phil Taylor did that, it would be reported on the back page of every newspaper".
Mardle added: "What he didn't do is what every other darts player would have done".
Pipe has since responded to the allegations, releasing the following statement.
"I've had 30 years of experience and I've never played in a game like that in my career". As far as I'm aware there is no issue from his side and this has been blown out of all proportion.
Pipe has endured a dip in form in recent years, and needed all five sets to set up a meeting with Phil Taylor in round two, which will take place on Saturday evening.
After the match, Taylor admitted he felt sorry for Pipe. "I just wanted to pinch that first set as I knew it'd be hard to concentrate for him with the crowd".