Radwanska, seeded ninth, made at least the quarterfinals five times in her 11 previous appearances - including losing to Serena Williams in the final in 2012.
We've known for a long time what Murray's capable of, but it's only been in the last couple of years that Konta has realised her potential. She may never have a better chance here. She had an unbelievable win and is a great player.
Konta has won both of her two WTA matches against Halep, each in a final set, and the Briton might also enjoy the benefit of some inside knowledge, given her coach Wim Fissette worked with the Romanian in 2014.
Halep also had the chance to seize the No.1 ranking at Roland Garros, but let a big lead slip in the French Open final against Jelena Ostapenko.
"Again, they were not in my shoes", Konta said.More news: United Nations adopts draft treaty on nuclear weapons ban
Konta was born to Hungarian migrant parents in Sydney, Australia. Her dad is a hotelier and her mum a dentist.
"It was actually as I was hitting my ball so it actually, I think, affected me more than my opponent", Konta said.
"He said, "Is she from Great Britain?"
After repeated questioning over her father's hand signals during the match, Garcia snapped: "Oh, my gosh". The game is scheduled to start no sooner than 15:00.
"It's good, but it makes me want to go further".
She would thus become the first Romanian to reach this position.
Halep will leapfrog Germany's Angelique Kerber in the rankings if she scuppers home hopes of a first British women's singles champion in 40 years with victory over Johanna Konta on Tuesday at the All England Club. With the £937,000 cheque from the Miami Open as well as the £147,000 accrued for reaching the second week of Wimbledon, she is well on her way past the £2m mark in career prize money.More news: Troy Williams, Thomas Bryant shine in Vegas Summer League openers
Konta had the momentum but Garcia is too good a player simply to be overwhelmed.
"However, it's many, many months ago now".
"So maybe sometimes there is something we can go wrong, but he is not trying to coaching me like the wrong way".
The great Serb, who has won Wimbledon three times, called for the doctor early on in the match against the tricky Mannarino, who on his way to the fourth round had put out seeds Juan Martin Del Potro and Feliciano Lopez.
Her father Gabor, a hotelier, and her mother Gabriella, a dentist, emigrated to the country separately and most of her extended family still live in Hungary.
The second Monday of Wimbledon promises a thrilling day of tennis for fans flocking to SW19, with the last 16 men and women in the singles draw all scheduled to play.More news: Pakistan plays significant role in peace, stability in Afghanistan: McCain