Konta got off to a flying start by breaking in the very first game.
Garcia has been denied the Centre Court appearance she craved for Monday's Wimbledon clash with Konta, after it was scheduled as the opening match on Court One.
"She has worked extremely hard on her tennis game, of her mental game".
"She stayed so focused and so calm in the big moments", said triple Grand Slam victor Tracy Austin on the BBC.
Azarenka is not playing at an overwhelmingly dominant level.
Simona Halep is into the fourth round at Wimbledon 2017. I was able to neutralise her balls.
Halep controlled the game reducing the errors while signs of rust surfaced in Azarenka's game. She has fallen behind in the first set of multiple matches at Wimbledon.
The Romanian is refusing to count her chickens after blowing an opportunity to go top at the French Open when she lost the final to Jelena Ostapenko from a set and a service break up. When Garcia had another set point, she appeared to hit it long, the ball was called out but then called in on review, to Konta's vast frustration.
Into the decider it went and as the match clock crossed the two-hour mark, with both players looking unbeatable on serve, it looked as if it may rival Konta's 3hr10mins second-round epic against Donna Vekic.
When Garcia ruled herself out of contention to play for France in the Fed Cup in April, by announcing she had a back injury after being selected against her wishes, Mladenovic together with fellow French players Alize Cornet and Pauline Parmentier each tweeted "LOL" nearly simultaneously.
Konta came through a tough test against France's Garcia in three sets, winning 7-6, 4-6, 6-4 on Court One. The instructions, however, didn't prevent Garcia to come back in the second set.
"I don't want to comment about that match but I'm sorry if she felt bad", said Halep, who is unlikely to find the genteel Wimbledon crowd similar to the braying mob they last played in front of.