Former World No.5 began working with Mike Joyce at the end of last season and finished the year by running to the semifinals at the BGL BNP Paribas Luxembourg Open, narrowly losing to the Wimbledon semifinalists Julia Goerges.
Playing Brengle on Monday, he took a quick 3-0 lead to start the match; even though the American returned to service, Bouchard remained ahead and took the first set.
Canada continued to take the second set with an identical scoreline, convert six of 10 break point opportunities and maintain the first service percentage of 68% throughout the decisive victory.
Waiting for Bouchard in the next round was eighth seed Alison van Uytvanck or Dutch qualifier Bibiane Schoofs.
More will come …